Most Active Speakers 2025

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

  • 1125 speakers
  • Auto-generated
Divakar Kumar

Divakar Kumar

Divakar Kumar is a Microsoft MVP in AI and a Microsoft Certified Trainer (MCT), working as a Technical Architect at Flyerssoft. He actively shares his knowledge through blogs, talks, and training sessions, empowering developers to harness the potential of AI in real-world applications.

Divakar Kumar is a Microsoft MVP in AI and a Microsoft Certified Trainer (MCT), working as a Technical Architect at Flyerssoft. He actively shares his knowledge through blogs, talks, and training sessions, empowering developers to harness the potenti... Show more

Michelle Sandford

Michelle Sandford

Michelle Sandford is a Developer Engagement Leader who writes code, builds with GitHub and Azure AI, and learns out loud. She likes sharing what’s useful (and what isn’t), and believes shipping is better than talking about it:

- A community builder, connecting MVPs, user groups, universities, and developer communities into thriving ecosystems that learn together and lift each other higher.
- A technical storyteller, Michelle shapes how the world talks about AI‑powered engineering and Azure innovation bringing clarity, curiosity, and creativity to every conversation.
- A program strategist, designing scalable, repeatable motions that help developers grow their capability and confidence at pace with a rapidly evolving industry.
- A bridge between engineering and the field making sure developers feel heard, supported, and empowered, from the first line of code to the final production push.

Michelle Sandford is a Developer Engagement Leader who writes code, builds with GitHub and Azure AI, and learns out loud. She likes sharing what’s useful (and what isn’t), and believes shipping is better than talking about it: - A community builde... Show more

Doug Leal

Doug Leal

Enterprise Architect with 25+ years of experience delivering data-centric solutions, including big data, cloud, analytics, and data engineering strategies in both enterprise and consulting capacities. Proven expertise in AWS, Azure Cloud, Databricks, MLFlow, and Spark, driving scalable and efficient data solutions. A trusted advisor in enterprise data architecture for both existing and new platforms; Databricks Champion for CGI. Passionate about machine learning and leveraging advanced analytics to drive business value.

Enterprise Architect with 25+ years of experience delivering data-centric solutions, including big data, cloud, analytics, and data engineering strategies in both enterprise and consulting capacities. Proven expertise in AWS, Azure Cloud, Databricks,... Show more

Diana Todea

Diana Todea

Diana is a Developer Experience Engineer at VictoriaMetrics. She has worked as a Senior Site Reliability Engineer focused on Observability. She is an active member of the OpenTelemetry CNCF open source project, co-organizer of Cloud Native Days Romania, co-lead of Neurodiversity working group, part of CNCF initiative Merge-Forward, and supports underrepresented groups in tech.

Diana is a Developer Experience Engineer at VictoriaMetrics. She has worked as a Senior Site Reliability Engineer focused on Observability. She is an active member of the OpenTelemetry CNCF open source project, co-organizer of Cloud Native Days Roman... Show more

Michael Plettner

Michael Plettner

With more than 2 decades of customer experience, a long history in Microsoft products, Michael is a Cloud Architect who enjoys sharing his experience with the community and help the community grow.
During the last years, Michael was working with customers in Microsoft Teams topics, Microsoft 365 implementations overall and since 2022 he's also working with his customers in different Microsoft Viva projects.
Since more than seven years Michael has its own company, working with the focus on Microsoft topics, Change-Management and Project-Management. He's also a Microsoft MVP for Microsoft 365 Apps and Services since 2021.

With more than 2 decades of customer experience, a long history in Microsoft products, Michael is a Cloud Architect who enjoys sharing his experience with the community and help the community grow. During the last years, Michael was working with cus... Show more

Emiliano Montesdeoca

Emiliano Montesdeoca

Emiliano is a Uruguayan-Spanish software developer, Microsoft MVP in Developer Technologies, and passionate community advocate based in Tenerife. He’s also a proud dad, balancing family life with a deep commitment to tech and community.

As Team Lead at Intelequia Technologies, he drives the design of scalable cloud solutions using Microsoft technologies, blending strategic vision with hands-on execution. With years of experience tackling complex challenges, Emiliano brings strong expertise in cloud architecture and team leadership.

A frequent speaker and blogger, he shares practical insights to support and mentor the global developer community—giving back to the ecosystem that shaped his own journey.

Emiliano is a Uruguayan-Spanish software developer, Microsoft MVP in Developer Technologies, and passionate community advocate based in Tenerife. He’s also a proud dad, balancing family life with a deep commitment to tech and community. As Team Le... Show more

Rodrigo Liberoff

Rodrigo Liberoff

Hi there… I'm Rodrigo, a Microsoft technologies veteran with more than 20+ years of experience.

In recent years, I have focused on Artificial Intelligence technologies, starting with Natural Language Processing (NPL) services such as Azure AI Language (previously known as Azure Cognitive Service for Language) and now with Generative AI (mainly Azure OpenAI), working on the potential and challenges (technical and ethical) of these new technologies and trying to help the community face them.

I also generate digital content to share my experience working with Artificial Intelligence services and resources, sharing tricks and strategies that anyone can follow, taking knowledge from the most basic levels to the most advanced. I publish my content through my YouTube channel (https://www.youtube.com/@CODERTECTURA), Twitch (https://www.twitch.tv/codertectura), LinkedIn and X social networks (formerly Twitter), my personal blog (www.codertectura.com), and other media such as the ENCAMINA blog (my current company), allowing me to reach more people through these channels.

I am a co-founder and main contributor of the open-source library ENMARCHA (https://github.com/Encamina/enmarcha), which showcases some of my experience and knowledge with Microsoft and Azure libraries for Artificial Intelligence. The idea is to help the community adopt these technologies and accelerate their own projects and initiatives.

If you want, we can connect at @rliberoff 😎

Hi there… I'm Rodrigo, a Microsoft technologies veteran with more than 20+ years of experience. In recent years, I have focused on Artificial Intelligence technologies, starting with Natural Language Processing (NPL) services such as Azure AI Lang... Show more

Callum Whyte

Callum Whyte

Callum Whyte is a x6 Microsoft MVP and x9 Umbraco MVP specialising in building robust scalable solutions on Azure and the .NET stack, as well as websites with the open-source Umbraco CMS. By day he heads up the award-winning team at Bump, across the UK and Australia.

Away from his desk you can find him organising community events; from local meetups and hackathons, to global conferences and roadshows. He’s an active contributor to open source projects, a regular speaker at events all over the world, as well as co-host of a weekly YouTube series “UmbraCoffee”!

Callum Whyte is a x6 Microsoft MVP and x9 Umbraco MVP specialising in building robust scalable solutions on Azure and the .NET stack, as well as websites with the open-source Umbraco CMS. By day he heads up the award-winning team at Bump, across the ... Show more

Cristina Tarabini-Castellani Ciordia

Cristina Tarabini-Castellani Ciordia

Ingeniera Informática, especializada en SQL Server. Mas de 12 años modelando, desarrollando, administrando y optimizando bases de datos en un entorno en el que la información debe de llegar en el menor tiempo posible.

Ingeniera Informática, especializada en SQL Server. Mas de 12 años modelando, desarrollando, administrando y optimizando bases de datos en un entorno en el que la información debe de llegar en el menor tiempo posible. Show more

Luc Labelle

Luc Labelle

Luc brings over two decades of IT expertise to the table, with a remarkable 15-year tenure as a consultant. Throughout his career, he has spearheaded numerous projects centered around Office 365, SharePoint, Power BI, and Power Platform, accumulating a wealth of experience in diverse business environments. This extensive exposure has sculpted Luc into a highly skilled professional with a deep understanding of various business models.

Driven by his fervor for technology, Luc established his own consulting firm, Kabesa, in 2014. Actively immersed in the Montreal community, he is a frequent contributor to events, wearing multiple hats as both an organizer and a speaker. As a distinguished Business Applications MVP, Luc leads the Montreal Power Platform User Group and is sought after globally for his expertise, having delivered numerous sessions worldwide, each showcasing the cutting-edge innovations of Microsoft technology.

Luc brings over two decades of IT expertise to the table, with a remarkable 15-year tenure as a consultant. Throughout his career, he has spearheaded numerous projects centered around Office 365, SharePoint, Power BI, and Power Platform, accumulating... 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

Sebastian Nilsson

Sebastian Nilsson

Meet Sebastian, an experienced problem-solver who's professionally been blending technology with creativity since 2003. He’s helped teams bring ideas to life and build cultures that truly put people first. Whether freelancing or leading global teams, Sebastian finds clever solutions that make a real impact.

A regular speaker at tech events—and once the organizer behind Sweden’s biggest .NET meetup at the .NET Core 1.0 launch—he's always exploring fresh ways to mix tech and teamwork, proving that smart solutions can be both effective and engaging.

Meet Sebastian, an experienced problem-solver who's professionally been blending technology with creativity since 2003. He’s helped teams bring ideas to life and build cultures that truly put people first. Whether freelancing or leading global teams,... Show more

Mario Fahlandt

Mario Fahlandt

Mario is from a small village in Germany and working for Kubermatic. He studied creative media at an English university and moved his field of knowledge to Cloud Native Infrastructure. He is working as a Customer Delivery Architect with the focus on planning and building concepts and architecture for Infrastructure in the Cloud native world. He started the Google Developer Group for Cloud in Munich back in 2016 and became a Cloud Google Developer Expert in 2019. His passion is always to move the cloud native community one step forward.

Mario is from a small village in Germany and working for Kubermatic. He studied creative media at an English university and moved his field of knowledge to Cloud Native Infrastructure. He is working as a Customer Delivery Architect with the focus on ... Show more

Tom Colvin

Tom Colvin

I'm a Google Developer Expert in Android, available either as a freelancer or through Apptaura, the mobile app development agency I co-founded. I build great apps for people, helping them to build great app businesses. I have a commercial focus and a wide knowledge of many technologies (both back- and front-end).

I'm a regular conference speaker on topics related to Android, and app startups more generally. I also provide mentorship to those looking to start app businesses.

I have a proven entrepreneurial capability and enjoy the energy of startup culture.

I'm a Google Developer Expert in Android, available either as a freelancer or through Apptaura, the mobile app development agency I co-founded. I build great apps for people, helping them to build great app businesses. I have a commercial focus and a... Show more

Ana Maria Bisbe York

Ana Maria Bisbe York

Ana María is a data professional with over 35 years of experience in the software industry and extensive experience, both in training and in projects, in data modeling and analysis with Microsoft technology like SQL, Power BI, and Fabric for advanced analytics.
She shares knowledge and experiences and promotes the visibility of female talent in technology.
You can find her in forums and international events and congresses in Spain, many European countries, LATAM, and the United States, as a speaker, organizer, or attendee, and also online on her Twitter account (ambynet), on LinkedIn (https://www.linkedin.com/in/ambynet/) or her technical blog at AMBY.NET (https://amby.net/) which he has maintained for almost 20 years. She is a Power Platform Madrid community co-leader and leads projects and initiatives in Power Platform Spain.

Ana María is a data professional with over 35 years of experience in the software industry and extensive experience, both in training and in projects, in data modeling and analysis with Microsoft technology like SQL, Power BI, and Fabric for advanced... Show more

Brent Ozar

Brent Ozar

I make Microsoft SQL Server go faster. I love teaching, travel, cars, and laughing. Las Vegas, US. He/him.

I make Microsoft SQL Server go faster. I love teaching, travel, cars, and laughing. Las Vegas, US. He/him. Show more

Nerando Johnson

Nerando Johnson

Current Atlanta freeCodeCamp Organizer | Software Developer

Current Atlanta freeCodeCamp Organizer | Software Developer Show more

Dan Bergh Johnsson

Dan Bergh Johnsson

Dan Bergh Johnsson works at the intersection of software architecture, security, and large-scale system design. He has decades of experience designing and reviewing complex systems where security, stability, and delivery speed are in constant tension.
Dan is co-author of Secure by Design (Manning) and a frequent international conference speaker. His talks focus on how architectural and design choices — increasingly involving AI — shape long-term security, system behavior, and organizational responsibility. He is particularly interested in what gets lost when productivity increases faster than system understanding.

Dan Bergh Johnsson works at the intersection of software architecture, security, and large-scale system design. He has decades of experience designing and reviewing complex systems where security, stability, and delivery speed are in constant tensio... Show more

Lorenzo Barbieri

Lorenzo Barbieri

From the moment I turned on my Vic-20, 40 years ago, I knew my life was aimed at technology. I've always been the first in line to test out new products, services, gadgets, especially those which promised to change people’s lives. I’ve always been a tech superhero.
After all these years, my personal mission went from changing the world through technology to improving the world, one human interaction at a time. Changing the way people live in the digital age is possible only by addressing the human factor, together with technology.
My proven track record of driving sales involves creating connections, building communities, challenging views, delivering value, and going the extra mile.
As a Cloud Architect and Evangelist, I’ve presented technical and business content to a wide range of different audiences, from executive meetings to large developer conferences, including many online and in-person events, and I was recognized as the “best speaker” multiple times, thanks to a clever mix of storytelling and technology.
I have a deep technical knowledge of Application Innovation and Modernization in the Cloud, Cloud Native solutions and, of course, on-premises solutions. I can drive product development and technology teams.
I have a deep business knowledge of Manufacturing, Automotive, and Construction business, coupled with a broad knowledge of ISVs and Microsoft partners.
So, if you're ever in need of an evil genius being able to impact deals through human interactions and technology, look no further. I’m the right person to help with your business!

From the moment I turned on my Vic-20, 40 years ago, I knew my life was aimed at technology. I've always been the first in line to test out new products, services, gadgets, especially those which promised to change people’s lives. I’ve always been a ... Show more

Gianluca Sartori

Gianluca Sartori

Gianluca Sartori is a Data Platform MVP, independent consultant and performance tuning specialist. He has been working in the software industry since 1999 and has been working with SQL Server ever since. He also works as a SQL Server trainer and in his spare time he writes technical articles and participates the SQL Server forums. Gianluca enjoys presenting SQL Server topics at conferences in Europe and US. He is currently working as lead DBA at a famous Formula 1 team.

Gianluca Sartori is a Data Platform MVP, independent consultant and performance tuning specialist. He has been working in the software industry since 1999 and has been working with SQL Server ever since. He also works as a SQL Server trainer and in h... Show more

Zahhar Kirillov

Zahhar Kirillov

During 20+ years spent in ICT industry, I had a privilege to wear all possible hats, acting as a software developer, UX designer, university lecturer, startup entrepreneur, CIO and finally as a delivery manager at S&P500 engineering company. Creating software is my biggest passion. I stay hands-on by delivering PoC and MVP to clients, diving into all aspects of modern technology, be it cloud computing, blockchain or AI. Originally from Estonia, since 2016 I live in Switzerland and in free time I enjoy doing yoga and snowboarding.

During 20+ years spent in ICT industry, I had a privilege to wear all possible hats, acting as a software developer, UX designer, university lecturer, startup entrepreneur, CIO and finally as a delivery manager at S&P500 engineering company. Creating... Show more

Vincent Caldeira

Vincent Caldeira

Vincent Caldeira, Red Hat APAC CTO and Industry Visiting Scholar at Columbia University, drives tech strategy and emerging engineering. A Top 10 APAC CTO (2023) with 20+ years in finance IT, he is an authority on open source, cloud-native technologies and AI. Vincent holds leadership roles across the Linux Foundation (FINOS, LF AI & Data) and GSF, championing AI safety, sustainability, and digital sovereignty.

Vincent Caldeira, Red Hat APAC CTO and Industry Visiting Scholar at Columbia University, drives tech strategy and emerging engineering. A Top 10 APAC CTO (2023) with 20+ years in finance IT, he is an authority on open source, cloud-native technologie... Show more

Antonio Liccardi

Antonio Liccardi

Antonio Liccardi is a seasoned speaker, book author, and trainer, currently serving as Chief Technology Officer at Blexin. His passion for knowledge sharing led him to co-found "DotNetCampania," an Italian .NET community where he helps others enhance their skills in DevOps, the .NET ecosystem, and software development in general. Antonio is a frequent speaker at both national and international conferences, including Microsoft Build, and has been recognized as a Microsoft MVP for Visual Studio Developer Technologies since 2015. He also hosts a live show called "DevOps Time" for UgiDotNet, Italy’s largest .NET community, and runs the podcast "Il corriere del DevOps."

Antonio Liccardi is a seasoned speaker, book author, and trainer, currently serving as Chief Technology Officer at Blexin. His passion for knowledge sharing led him to co-found "DotNetCampania," an Italian .NET community where he helps others enhance... Show more

Jochen Kirstätter

Jochen Kirstätter

Although living on a tropical island, Jochen Kirstätter is a business owner and entrepreneur in different industry sectors. Mainly operating in the development of tailor-made software solutions since more than 20 years, he is also venturing into the world of cloud computing. You can either meet him at the regular meetups of the Mauritius Software Craftsmanship Community or reach him on X and Mastodon: @JKirstaetter.

Jochen is a Google Developer Expert (GDE) for Google Cloud and a Microsoft Most Valuable Programmer (MVP) for Developer Technologies for several years. He founded the now largest IT community in Mauritius, and organises the annual Developers Conference. Following his interest in cross-platform technologies he is also an organiser of the Google Developer Group (GDG) Mauritius.

Although living on a tropical island, Jochen Kirstätter is a business owner and entrepreneur in different industry sectors. Mainly operating in the development of tailor-made software solutions since more than 20 years, he is also venturing into the ... Show more

John Kerski

John Kerski

John leverages his 10+ years of technical and government leadership experience to help Federal Agencies, and private sector clients utilize Microsoft products to their fullest potential. His certifications with Microsoft products offers customers a high rate of return when looking to invest in Microsoft solutions.

John leverages his 10+ years of technical and government leadership experience to help Federal Agencies, and private sector clients utilize Microsoft products to their fullest potential. His certifications with Microsoft products offers customers a h... Show more

Oliver Engels

Oliver Engels

Oliver Engels is CEO of oh22data AG, a Microsoft Data & AI Partner in Germany specialized in CRM, Data and AI. His interests are on Azure, Data Governance and Integration, AI and Visualization Tools like Power BI and Tableau. Oliver has worked with SQL Server since version 6.5 and is a founding member and current president of German Microsoft Data Platform Community (Datamonster e.V.) and runs the Frankfurt Datamonster Chapter (Hord). Since 2012 he is a Microsoft Data Platform MVP and a also worked as a Microsoft pTSP. If he is not working with data, he loves working with his Golden Retrievers and supports a charity project training dogs for disabled children. OK, he is an enthusiastic Land Rover Defender driver as well 😊

Oliver Engels is CEO of oh22data AG, a Microsoft Data & AI Partner in Germany specialized in CRM, Data and AI. His interests are on Azure, Data Governance and Integration, AI and Visualization Tools like Power BI and Tableau. Oliver has worked with S... Show more

Adrian Ritter

Adrian Ritter

Modern Collaboration @glueckkanja

Adrian works as Cloud Architect Modern Collaboration at glueckkanja AG. For more than 17 years, he has focused on designing and implementing collaboration platforms based on Microsoft technologies.

His roots lie in working as a SharePoint consultant. In many projects he was able to gather expert knowledge around business requirements for collaboration and processes as well as user adoption.

Modern Collaboration @glueckkanja Adrian works as Cloud Architect Modern Collaboration at glueckkanja AG. For more than 17 years, he has focused on designing and implementing collaboration platforms based on Microsoft technologies. His roots li... Show more

Henning Schwentner

Henning Schwentner

Henning loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architecture. Microservices or self-contained systems are often the result. Henning is author of “Domain Storytelling” (Addison-Wesley 2022), “Domain-Driven Transformation” (Addison-Wesley 2024) and the www.LeasingNinja.io.

Henning loves programming in high quality. He lives this passion as coder, coach, and consultant at WPS – Workplace Solutions. There he helps teams to structure their monoliths or to build new systems from the beginning with a sustainable architectur... Show more

Christian Glessner

Christian Glessner

Christian Glessner is the founder of Hololux, an innovation agency at the intersection of artificial intelligence and immersive technology.

As a 17-year Microsoft Most Valuable Professional (MVP) and early contributor to Microsoft’s new Agent Framework, he explores how multi-agent orchestration and graph intelligence are shaping the future of enterprise automation.

A German Innovation Award 2024 winner, Christian bridges advanced AI concepts with real-world business impact.

Known for his energetic, demo-driven presentations, he makes complex agent architectures tangible and inspires teams to build smarter, connected systems.

Christian Glessner is the founder of Hololux, an innovation agency at the intersection of artificial intelligence and immersive technology. As a 17-year Microsoft Most Valuable Professional (MVP) and early contributor to Microsoft’s new Agent Fram... Show more

Traci Sewell

Traci Sewell

Traci joined the community to take the tech down a notch! She lives in Somerset with some (very cute) cats, some horses, some sheep, and her husband, Rob. When not looking after all of those, she also works to sooth people's minds as a psychotherapist. Being tech-adjacent she has been drawn into the tech event organising world and the wider community, where she brings her life long knowledge, expertise and fearsome determination to empower and protect those who are outside of the generic majority box. Over the past few years she has also found a voice as a speaker, sharing information and insights into all things mental health and wellbeing - which has lead to providing Team Dynamics training and Project Management.

Traci joined the community to take the tech down a notch! She lives in Somerset with some (very cute) cats, some horses, some sheep, and her husband, Rob. When not looking after all of those, she also works to sooth people's minds as a psychotherapis... 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.