Most Active Speakers 2025

Sessionize proudly presents the list of the most active speakers in the year 2025!

  • 1125 speakers
  • Auto-generated
Khaled Nassra

Khaled Nassra

As the Managing Director of Enki Consulting, Khaled advises leadership teams responsible for global go-to-market strategy and business expansion into new verticals and regions through new and existing partnerships, through Microsoft, and by working directly with end-users. Khaled has led multiple organizations from no market share to success by prioritizing customer and partner benefits and working in sync within a broader ecosystem.

As the Managing Director of Enki Consulting, Khaled advises leadership teams responsible for global go-to-market strategy and business expansion into new verticals and regions through new and existing partnerships, through Microsoft, and by working d... Show more

Dan Mallott

Dan Mallott

Dan Mallott is a Senior Principal at West Monroe based in Chicago, IL, USA. His passion is for distributed architecture, designing and building high performing service layers from the API down to the database.

Prior to returning to West Monroe, Dan spent two years at e-conomic in Copenhagen, Denmark, with the final 15 months as Head of Platform and Infrastructure. Dan was responsible for leading the Platform, SRE, and API teams in building a solid foundation for the e-conomic product. Previously, Dan was focused on leading the Platform Team in improving the cross-cutting concerns in the e-conomic application, including improving security, improving messaging performance, and managing the migration to .NET 6.0.

Before joining e-conomic, Dan was a Senior Principal for West Monroe, based in Chicago, IL, USA. While at West Monroe, Dan's projects included designing high performing architectures for a variety of clients, as well as developing APIs and UIs for healthcare, insurance, and financial services clients. Along the way, Dan worked with .NET Framework, .NET Core, Java/Spring Boot, React, and Angular. He also gained experience with a number of database technologies, including DataStax, Cassandra, Microsoft SQL Server, Oracle, and PostgreSQL. Prior to joining West Monroe, Dan worked for a number of companies, focusing on .NET and Microsoft SQL Server development, including experience as a DBA.

Past speaking engagements have included PASS Summit, NDC London, NDC Melbourne, NDC Sydney, KCDC, Code PaLOUsa, and numerous SQL Saturdays throughout the US. Dan enjoys speaking at both large and small conferences, and values the interactions he gets with attendees and other speakers.

In his spare time, he can be found writing his own software instead of using package solutions or on the ice as an ice hockey player and referee.

Dan Mallott is a Senior Principal at West Monroe based in Chicago, IL, USA. His passion is for distributed architecture, designing and building high performing service layers from the API down to the database. Prior to returning to West Monroe, Da... Show more

Kat Fitzgerald

Kat Fitzgerald

Porto-based and powered by chaos, I split my time between Portugal, Chicago, and wherever the next conference or suspicious packet capture happens to be. Equal parts cybersecurity architect, honeypot wrangler, and frequent flyer with a questionable relationship to gravity, I run a growing Honeypot Empire designed to annoy attackers around the globe!!

When not speaking at security conferences or building deceptive little digital trapdoors for internet goblins, I can usually be found hopping continents, mentoring folks in cybersecurity, sipping dangerously good tequila, or voluntarily jumping out of perfectly functional airplanes. Sasha the Dancing Flamingo still supervises operations with chaotic authority and absolutely believes she deserves root access.

Porto-based and powered by chaos, I split my time between Portugal, Chicago, and wherever the next conference or suspicious packet capture happens to be. Equal parts cybersecurity architect, honeypot wrangler, and frequent flyer with a questionable r... Show more

Tomasz Poszytek

Tomasz Poszytek

With a passion for enhancing organizational effectiveness through digitalization and process optimization, Tomasz brings extensive expertise as a seasoned Business Analyst. As a distinguished Microsoft Power Platform expert, recognized with the Microsoft Most Valuable Professional (MVP) title and multiple certifications, including Microsoft Certified Trainer (MCT), Tomasz possesses a robust analytical acumen. With proficiency in SharePoint, Nintex, Webcon, and other process implementation tools, Tomasz continuously updates his knowledge to deliver cutting-edge solutions and shares insights with both clients and technical communities.

Renowned for crafting user-friendly business processes and applications, Tomasz prioritizes simplicity and reliability, ensuring seamless adoption and comprehension. As a dedicated co-organizer of community events in Poland and an active blogger, Tomasz contributes actively to the technical community and serves as an esteemed international speaker.

With a passion for enhancing organizational effectiveness through digitalization and process optimization, Tomasz brings extensive expertise as a seasoned Business Analyst. As a distinguished Microsoft Power Platform expert, recognized with the Micro... Show more

Fernando Chiquiza

Fernando Chiquiza

Bogotano que desde el año 2010 trabaja como consultor en área de colaboración y productividad enfocándose en el uso eficaz de las herramientas tecnológicas, especialmente en productos Microsoft, MVP hace 11 años con amplia experiencia diseñando y desarrollando soluciones tecnológicas, líder de la comunidad @PointCollCom, director de @PointCollOrg. Actualmente dedicado a proyectos de adopción de Inteligencia artificial Microsoft en ENCAMINA.

Bogotano que desde el año 2010 trabaja como consultor en área de colaboración y productividad enfocándose en el uso eficaz de las herramientas tecnológicas, especialmente en productos Microsoft, MVP hace 11 años con amplia experiencia diseñando y des... Show more

Nico Vermeir

Nico Vermeir

Nico Vermeir is a Cloud Solution Architect at Microsoft, where he has a strong focus on application innovation and AI.

Being a strong believer in the importance of communities he tries to share knowledge wherever he can, be it on BlueSky, at a user group or conference. He has spoken on many international conferences such as NDC Oslo, NDC Sydney, NDC London, Swetugg, Build Stuff, DotNext.
Nico is a former Microsoft MVP in Developer Technologies, crew member of Techorama BE and NL and crew member of VISUG, Belgium's largest .NET user group.

In his spare time he enjoys brewing (and tasting) beer, playing the guitar, riding his Harley-Davidson and doing Karate.

Nico Vermeir is a Cloud Solution Architect at Microsoft, where he has a strong focus on application innovation and AI. Being a strong believer in the importance of communities he tries to share knowledge wherever he can, be it on BlueSky, at a use... Show more

Santhoshkumar Srinivasan

Santhoshkumar Srinivasan

Santhosh is a results-oriented Senior Software Architect with over 18 years of experience leading and delivering innovative software solutions for enterprises specialising in financial institutions and cloud migration.

Over the last decade, Santhosh has worked with several leading Financial Institutions, such as JP Morgan Chase, Fidelity, and Visa, helping their teams accelerate their journey to the Cloud and modernise their application stacks while adhering to strict security requirements and regulatory guidelines.

He specializes in application modernization and cloud-native architectures and is keenly interested in achieving cost efficiency through innovative use of cloud-native and managed services.

With a penchant for AI and ML, he has spearheaded multiple innovative solutions on adopting Generative AI models and tools for real-world solutions while ensuring the solutions are built responsibly and securely.

Santhosh is a results-oriented Senior Software Architect with over 18 years of experience leading and delivering innovative software solutions for enterprises specialising in financial institutions and cloud migration. Over the last decade, Santho... Show more

Kevlin Henney

Kevlin Henney

Kevlin is an independent consultant, trainer, speaker and writer. His development interests and work with companies covers programming, practice and people. He is a contributor to the Modern Software Engineering YouTube channel and has written for many publications, including The Register and the O'Reilly Radar. Kevlin is also co-author of two volumes in the Pattern-Oriented Software Architecture series, editor of 97 Things Every Programmer Should Know and co-editor of 97 Things Every Java Programmer Should Know.

Kevlin is an independent consultant, trainer, speaker and writer. His development interests and work with companies covers programming, practice and people. He is a contributor to the Modern Software Engineering YouTube channel and has written for ma... Show more

Bülent Altinsoy

Bülent Altinsoy

Bülent has worked at Avande for 15 years, where he drives Copilot and Copilot Studio. He is passionate about sharing and entertaining with his knowledge and insights on Copilot and the Power Platform.

Bülent has worked at Avande for 15 years, where he drives Copilot and Copilot Studio. He is passionate about sharing and entertaining with his knowledge and insights on Copilot and the Power Platform. Show more

Michelantonio Trizio

Michelantonio Trizio

Engineer & Digital entrepreneur. I took the master degree in computer engineering with a thesis on AI at Polytechnic University of Bari in 2007. I worked for several years in ICT companies in Italy as a backend software developer. I attended the Mind The Bridge startup school in San Francisco in 2011. Back in Italy I started working on my own companies. Now, I'm the CTO of Wideverse, a spin-off of the Polytechnic University of Bari that works on XR and AI technologies. In addition I'm the founder and the current lead of Google Developer Group Bari community. I’m a public speaker globetrotter nerd with the passion for SUP, running, Rock and photography. BBQ and IPA beers addicted.

Engineer & Digital entrepreneur. I took the master degree in computer engineering with a thesis on AI at Polytechnic University of Bari in 2007. I worked for several years in ICT companies in Italy as a backend software developer. I attended the Mind... Show more

April Dunnam

April Dunnam

April Dunnam is a Principal Cloud Advocate at Microsoft, Microsoft Certified Trainer, and author of The Copilot Compass (Apress, 2026), a practical guide to navigating Copilot and agents in Microsoft 365. Known for her ability to demystify the Power Platform and AI for both developers and makers, she blends deep technical knowledge with a knack for making complex topics approachable and fun.

With a passion for community and sharing knowledge, April runs a popular YouTube channel dedicated to Power Platform, AI, and low-code development. She actively contributes to the Microsoft 365 and Power Platform community through sample contributions, community calls, and mentorship.

April's expertise has been recognized with the Microsoft Technology Excellence Award for her innovative Power Platform solutions. She is a frequent speaker at international conferences, helping businesses and developers harness the full potential of AI and the Power Platform. When she's not advocating for the Power Platform, you can find her performing with her rock band or fueling her caffeine and LEGO building habits.

April Dunnam is a Principal Cloud Advocate at Microsoft, Microsoft Certified Trainer, and author of The Copilot Compass (Apress, 2026), a practical guide to navigating Copilot and agents in Microsoft 365. Known for her ability to demystify the Power ... Show more

Oskari Heikkinen

Oskari Heikkinen

Oskari has over a decade of experience in using Azure for data analytics at scale. He has been designing and implementing numerous projects for some of the largest companies in the Nordics. As a Microsoft Certified Trainer (MCT), Oskari conducts classes for subject-matter experts and consultants and provides external customer training sessions. He is also an active speaker at community events. Oskari has been honored with the Microsoft Most Valuable Professional (MVP) award in the Data Platform category six times. Additionally, he is certified as an Azure Solutions Architect, Fabric Analytics Engineer, and Azure Data Engineer.

Oskari has over a decade of experience in using Azure for data analytics at scale. He has been designing and implementing numerous projects for some of the largest companies in the Nordics. As a Microsoft Certified Trainer (MCT), Oskari conducts clas... Show more

Ugur Koc

Ugur Koc

VP of AI at SoftwareCentral and a Microsoft MVP for Intune and Security Copilot.

VP of AI at SoftwareCentral and a Microsoft MVP for Intune and Security Copilot. Show more

Miley Fu

Miley Fu

Miley is a Developer Advocate committed to build and contribute to open source. She is the co-chair and keynote speaker for KubeCon+Open Source Summit and AI Dev China 2024. She works on WasmEdge runtime under Linux Foundation as the founding member for over 6 years. She talks at KubeCon, KCD Beijing+Shenzhen, CloudDay Italy, DevRelCon, Open Source Summit Japan, AWS User Group, Global AI Note, KubeDay Singapore etc. Miley writes tech content and organizes dev events, including KCDs, MCP and AI Agent Meetups, GOSIM AI PARIS, Wasm track at FOSDEM, in EU, the US, Asia, and more. She is also the lead organizer for GOSIM the open source AI conference.

Miley is a Developer Advocate committed to build and contribute to open source. She is the co-chair and keynote speaker for KubeCon+Open Source Summit and AI Dev China 2024. She works on WasmEdge runtime under Linux Foundation as the founding member ... Show more

Erland Sommarskog

Erland Sommarskog

Erland Sommarskog is an independent consultant based in Stockholm. He has worked with SQL Server since 1991. He was first awarded SQL Server MVP in 2001, and he has been re-awarded every year since. His focus is on systems development with the SQL Server Database Engine and his passion is to help people to write better SQL Server applications.

Erland Sommarskog is an independent consultant based in Stockholm. He has worked with SQL Server since 1991. He was first awarded SQL Server MVP in 2001, and he has been re-awarded every year since. His focus is on systems development with the SQL Se... Show more

Thorsten Pickhan

Thorsten Pickhan

I work as Cloud Architect at glueckkanja AG where I am responsible to plan and deploy UC infrastructures based on Microsoft technologies. I'm working as technician and consultant for more than 15 years and been specialized in Microsoft Lync/Skype for Business and Microsoft Teams for 8 years. From beginning of my UC consultant career, I was focused on Enterprise Voice implementations.
Since a few years I am co-organizer of the Microsoft Teams User Group Germany and involved in the community as speaker and blog post author. In March 2020, I started my own Office 365 YouTube channel where I publish on a regular basis new video content for my weekly “Office 365 QuickTipps” channel. In a further YouTube project, together with my friend Michael Plettner, we release a German Microsoft 365 Talk.
Since July 2021, I have been a Microsoft MVP for Microsoft 365 in recognition of my commitment to the Microsoft Tech Community.

I work as Cloud Architect at glueckkanja AG where I am responsible to plan and deploy UC infrastructures based on Microsoft technologies. I'm working as technician and consultant for more than 15 years and been specialized in Microsoft Lync/Skype for... Show more

Sergès Goma

Sergès Goma

Sergès Goma is a Paris-based software developer specialized in Java and JavaScript. When she's not fixing codebases, she gives motivational speeches mostly aimed at junior and would-be developers as well as participating in the tech women's empowerment association Motiv'Her.

Sergès Goma is a Paris-based software developer specialized in Java and JavaScript. When she's not fixing codebases, she gives motivational speeches mostly aimed at junior and would-be developers as well as participating in the tech women's empowerme... Show more

Vadzim Prudnikau

Vadzim Prudnikau

Hands-on Architect, IT Trainer, and Conference Speaker with 20+ years of experience, passionate about building high-quality software, mentoring developers, and sharing knowledge.

I've trained over 700 professionals in Architecture, EventStorming, and TDD, built and deployed more than 10 production-ready projects, led multiple development teams, and created a successful Java department from scratch. Along the way, I’ve mentored 20+ developers and conducted 100+ technical interviews.

My expertise lies in Java, but I also have experience with Kotlin, Groovy, and other programming languages. I believe that strong technical skills, continuous learning, teamwork, and knowledge-sharing are the keys to success in software development.

Hands-on Architect, IT Trainer, and Conference Speaker with 20+ years of experience, passionate about building high-quality software, mentoring developers, and sharing knowledge. I've trained over 700 professionals in Architecture, EventStorming, ... Show more

Toni Petrina

Toni Petrina

Lead SRE at Visma e-conomic, developer at heart and frequent speaker at conferences, meetups and local events. Found passion in QBasic, jumped through C++, C#, JavaScript, TypeScript - only to land in the world of YAML. Finally, a full-stack engineer! Nowadays works on everything from UI to Cloud tooling. He spends most of the time at the keyboard typing yet another demo or application. If you take his keyboard away from him, he will talk endlessly about code, best practices and what not to do... Been coding for over a decade to know if something is a programming fad or not - and prefers spaces over tabs. Strong proponent of Open Source and all things chocolate.

Lead SRE at Visma e-conomic, developer at heart and frequent speaker at conferences, meetups and local events. Found passion in QBasic, jumped through C++, C#, JavaScript, TypeScript - only to land in the world of YAML. Finally, a full-stack engineer... Show more

Alexander Schirmer

Alexander Schirmer

Microsoft 365 Compliance doesn’t have to be scary – let alone boring! I’m an expert for Compliance in M365 and a solution architect with a knack for translating complex compliance topics into language everyone understands - whether you're in IT, legal, or just trying to send an email without triggering DLP.
I work with organizations of all shapes and sizes to make compliance actually work for humans, not just for auditors. My mission is in helping teams find that sweet spot where security, usability, and compliance boost productivity instead of blocking it.

Microsoft 365 Compliance doesn’t have to be scary – let alone boring! I’m an expert for Compliance in M365 and a solution architect with a knack for translating complex compliance topics into language everyone understands - whether you're in IT, lega... Show more

Jacqui Read

Jacqui Read

Jacqui Read is an internationally-recognised architect, and author of Communication Patterns: A Guide for Developers and Architects. She works across the public and private sector at Made Tech, helping customers to architect systems and determine direction in complex environments. Jacqui is a keynote speaker at international conferences, covering topics such as software design, architecture practices, and technical communication. 

Her professional interests include collaborative modelling, knowledge management, Domain-Driven Design, sociotechnical architecture, and modernising enterprise architecture practices. Her personal website is https://jacquiread.com.

Jacqui Read is an internationally-recognised architect, and author of Communication Patterns: A Guide for Developers and Architects. She works across the public and private sector at Made Tech, helping customers to architect systems and determine dir... Show more

Niall Merrigan

Niall Merrigan

Niall is an Irish guy who managed to end up in Norway after finding out the country existed when he was in New Zealand. He works at Microsoft helping customers with their technology investments. He has very strong opinions on security, web tech, food and wine.

Niall is an Irish guy who managed to end up in Norway after finding out the country existed when he was in New Zealand. He works at Microsoft helping customers with their technology investments. He has very strong opinions on security, web tech, food... Show more

Carola Lilienthal

Carola Lilienthal

Dr. Carola Lilienthal is Managing Director of WPS - Workplace Solutions GmbH and has been regularly analysing the future viability of software architectures on behalf of her customers since 2003. In 2019, she summarized her experiences from over a hundred analyses in the book "Sustainable Software Architecture". In 2017, together with Henning Schwentner, she translated Vaughn Vernon's book "Domain-Driven Design Distilled" into German. In 2025 her book "Domain-Driven Transformation - Modernize Legacy Systems and Mitigate Risks" was published.

Dr. Carola Lilienthal is Managing Director of WPS - Workplace Solutions GmbH and has been regularly analysing the future viability of software architectures on behalf of her customers since 2003. In 2019, she summarized her experiences from over a hu... Show more

Christian Weyer

Christian Weyer

Christian Weyer is Co-Founder and CTO of Thinktecture AG and a catalyst for new technologies with a strong focus on the practical implementation of Generative AI in modern software solutions. With 30 years of experience in software engineering, he advises ISVs and enterprises across industries on how to efficiently integrate LLMs and advanced AI technologies into real-world applications.
As a cross-vertical AI technology advisor, Christian bridges strategy and execution — helping organizations move Generative AI from theory into productive practice. He is a passionate international speaker, sharing hands-on insights at conferences and events worldwide.
Christian is a Microsoft MVP for AI and a Google Developer Expert (GDE) for Web AI, maintaining close relationships with the product teams in Redmond and Mountain View.

Christian Weyer is Co-Founder and CTO of Thinktecture AG and a catalyst for new technologies with a strong focus on the practical implementation of Generative AI in modern software solutions. With 30 years of experience in software engineering, he ad... Show more

Radu Vunvulea

Radu Vunvulea

Radu Vunvulea is a technology enthusiast working as VP of Cloud for Endava. He has a vast experience in different technologies and industries. Most of his time is spent working with the cloud, helping companies to innovate and finding solutions to their business problems. He enjoys building bridges between people and helping others to grow. He shares his knowledge on his personal blog and at different events where he is invited as a speaker. In his spare time, he drives an IT community and he is also a Microsoft Regional Director and Microsoft Azure MVP.

Radu Vunvulea is a technology enthusiast working as VP of Cloud for Endava. He has a vast experience in different technologies and industries. Most of his time is spent working with the cloud, helping companies to innovate and finding solutions to th... Show more

Shannon Mullins

Shannon Mullins

Shannon Mullins is the CEO and founder of a BC Consulting Group and a Microsoft MVP of Business Applications. She has over 20 years' experience across a wide variety of disciplines and products,
including accounting, information technology, professional services, insurance, healthcare, mortgage
lending, distribution, manufacturing, project management and deployment and implementation of CRM and ERP systems. Shannon has a deep understanding of the functional aspects of projects, process automation and system design, and the reporting needs and requirements for complex ERP systems. Shannon is a former controller and accountant and holds a master's degree in Accountancy.

She currently resides in Nashville, TN and is an experienced international speaker and teacher.

Shannon Mullins is the CEO and founder of a BC Consulting Group and a Microsoft MVP of Business Applications. She has over 20 years' experience across a wide variety of disciplines and products, including accounting, information technology, professi... Show more

Roel Hartman

Roel Hartman

Roel started a long time ago using Oracle RDBMS 5, Oracle Forms 2.3, RPT/RPF and Oracle*Case 4.5. Since over 10 years he focuses mainly on Oracle Application Express.
Roel has been a speaker on UKOUG, OOW, Collaborate, ODTUG's Kscope and a number of local Oracle User Groups.
Within ODTUG he acted as the APEX Content Lead for the Kscope14 and KScope15 conferences and was a member of the Board of Directors from 2018 to 2024.
He keeps an (APEX-related) blog on https://roelhartman.blogspot.com.
In June 2009 Roel received an Oracle ACE award and in August 2010 he's appointed as Oracle ACE Director.
Roel is a co-writer of the "Expert Oracle Application Express" and "Oracle Application Express for Mobile Web Applications" books.
Roel is Director at APEX Consulting in The Netherlands.

Roel started a long time ago using Oracle RDBMS 5, Oracle Forms 2.3, RPT/RPF and Oracle*Case 4.5. Since over 10 years he focuses mainly on Oracle Application Express. Roel has been a speaker on UKOUG, OOW, Collaborate, ODTUG's Kscope and a number of... Show more

Javiera Laso

Javiera Laso

I’m a Lead software engineer and architect with a background in biotechnology. I specialize in modernizing legacy systems, transforming them into scalable, efficient, and maintainable solutions. I focus on applying Domain-Driven Design (DDD) principles to create software that not only meets technical requirements but also aligns with business goals.

I have experience designing modular, cloud-ready architectures and using techniques like microservices and event-driven design to solve complex challenges. I’m passionate about continuous learning and improvement, and I enjoy mentoring teams and promoting best practices in software development. My approach combines deep technical knowledge with a practical understanding of business objectives, ensuring that the solutions I deliver are both effective and future-ready.

I’m a Lead software engineer and architect with a background in biotechnology. I specialize in modernizing legacy systems, transforming them into scalable, efficient, and maintainable solutions. I focus on applying Domain-Driven Design (DDD) principl... Show more

Sara Lagerquist

Sara Lagerquist

A Business and Application Architect building solutions on the Power Platform based in Stockholm Sweden. Speaker, blogger, event organizer and very involved in community activities.

A Business and Application Architect building solutions on the Power Platform based in Stockholm Sweden. Speaker, blogger, event organizer and very involved in community activities. Show more

Anshika Tiwari

Anshika Tiwari

Anshika is a passionate DevOps/SRE Engineer who is always eager to learn & implement cloud-native solutions, she has contributed to streamlining deployment processes and enhancing system reliability. She is eager to share her experiences and insights at conferences, contributing to the open-source community through talks, mentorship, and collaboration.

Anshika is a passionate DevOps/SRE Engineer who is always eager to learn & implement cloud-native solutions, she has contributed to streamlining deployment processes and enhancing system reliability. She is eager to share her experiences and insights... Show more

Please note that Sessionize is not responsible for the accuracy or validity of the data provided by speakers.

Most Active Speakers 2025

Every year, we put together a list of the most active speakers. This list features the top 3% of speakers who have participated in events using Sessionize during the 2025.

The 3% is calculated from the pool of all speakers that have at least one accepted session in year 2025. We don't include inactive speakers or speakers that had no accepted sessions during the year. There are around 39,000 unique accepted speakers this year, the 3% is 1163. Not all of them have their speaker profiles set as public, and we respect that, so the list doesn't show all of them.

The calculation is based on the number of accepted events, that's the main criteria, but to get more refined results we also look at things like multiple sessions per event, sharing a session with a co-speaker and how big the event is. Number of submissions and declined sessions don't affect the list.

Please note that the count of events and sessions in this list does not represent the number of events and sessions from the year 2025. Instead, it shows the number of events and sessions featured on the speaker's public speaker profile; these numbers have nothing to do with the award itself.