Most Active Speakers 2025

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

  • 1125 speakers
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Joel Tosi

Joel Tosi

Co-Author of 'Signals & Levers (ITRevolution, September 2026)', 'Coaching for Learning; the Art and Practice' and 'Create Your Dojo; Upskilling Your Organization for Digital Evolution,' Joel helps organizations evolve through learning. This combines a blend of systems thinking, XP, agile, lean, devops and product thinking practices all to embrace learning in the context of work.
With deep experience in architecture modernization, blending product discovery with delivery and architecture, and systems thinking, Joel helps organizations make it easier for their teams to do great work.

Co-Author of 'Signals & Levers (ITRevolution, September 2026)', 'Coaching for Learning; the Art and Practice' and 'Create Your Dojo; Upskilling Your Organization for Digital Evolution,' Joel helps organizations evolve through learning. This combines... Show more

Mark Rackley

Mark Rackley

Mark is Director of the Microsoft Practice at Protiviti and a 10-year Microsoft MVP with more than 25 years of experience designing and developing software solutions. Mark’s daily responsibilities include forging the direction of solution architecture and development projects for clients while providing the best solutions for clients' unique problems. Mark has a unique ability to breakdown complicated technical topics in a way that are easily consumable by a non-technical audience and engages his audience with humor and real-world stories. As a globally recognized M365 geek, Mark is an active blogger, presenter, author (and bacon aficionado) who is eager to lend his real-world knowledge of SharePoint to all who need it.

In addition to speaking at various SharePoint & Office 365 conferences around the world, Mark is the organizer of The North American Collaboration Summit (www.collabsummit.org) in Branson, Missouri

Mark is Director of the Microsoft Practice at Protiviti and a 10-year Microsoft MVP with more than 25 years of experience designing and developing software solutions. Mark’s daily responsibilities include forging the direction of solution architectur... 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

Reid Havens

Reid Havens

As the founder of both (Havens Consulting & Analytic Endeavors) and a Microsoft MVP, Reid is a seasoned professional with a wealth of experience in technology, organizational management, and business analytics. With a Master's Degree in Organizational Development and a background in consulting for Fortune 10, 50, and 500 companies, Reid has the knowledge and expertise to help your organization succeed.

In addition to his corporate experience, Reid is also a highly sought-after instructor, teaching Business Intelligence, reporting, and data visualization at the University of Washington and other universities. His passion for education extends beyond the classroom, as he has co-authored the DP-500 Enterprise Azure Analyst certification exam for Microsoft and developed numerous training curriculums delivered to companies around the world.

As the founder of both (Havens Consulting & Analytic Endeavors) and a Microsoft MVP, Reid is a seasoned professional with a wealth of experience in technology, organizational management, and business analytics. With a Master's Degree in Organizationa... Show more

Arthur Doler

Arthur Doler

Arthur (or Art, take your pick) has been a software engineer for 22 years and has worked on things as exciting as analysis software for casinos and things as boring as banking websites. He is an advocate for talking openly about mental health and psychology in the technical world, and he spends a lot of time thinking about how we program and why we program, and about the tools, structures, cultures, and mental processes that help and hinder us from our ultimate goal of writing amazing things. His hair is brown and his thorax is a shiny blue color.

Arthur (or Art, take your pick) has been a software engineer for 22 years and has worked on things as exciting as analysis software for casinos and things as boring as banking websites. He is an advocate for talking openly about mental health and psy... 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

Rajendra Ongole

Rajendra Ongole

I am currently working as a BI Lead Specialist within the Engineering and Tech Lead Team at Bosch Digital. Holding more than 8 certifications from Microsoft, such as Microsoft Certified Fabric Analytics Engineer, Power BI Analyst, and Microsoft Certified Trainer. I’ve shared insights in Power Platforms forums through sessions, and I contribute through blogging. I worked on different projects, delivering insights to clients. My current skills include: Microsoft Fabric, Microsoft Power BI, SQL, Azure Databricks, Microsoft Excel, Python, and Spark My knowledge-sharing efforts extend across various platforms, including writing blogs, technical reviews of books, forum participation, and live sessions. I take pride in actively participating in and contributing to the Microsoft forums, where I consistently share valuable insights and knowledge.

I am currently working as a BI Lead Specialist within the Engineering and Tech Lead Team at Bosch Digital. Holding more than 8 certifications from Microsoft, such as Microsoft Certified Fabric Analytics Engineer, Power BI Analyst, and Microsoft Certi... Show more

Rudy Ooms

Rudy Ooms

Rudy Ooms works as a Content Creator Manager at Patch My PC as of June 2024. He utilizes his extensive IT experience to create and manage content, particularly focusing on Microsoft Intune, Windows Autopilot, and Endpoint Privilege Management (EPM).

One of his hobbies (next to drinking some good beers) is debugging Intune issues. By doing so, he has learned much about all the moving pieces in Autopilot, Intune, and the associated intricacies. This knowledge is shared through the many blogs he writes on call4cloud.nl.

Rudy Ooms works as a Content Creator Manager at Patch My PC as of June 2024. He utilizes his extensive IT experience to create and manage content, particularly focusing on Microsoft Intune, Windows Autopilot, and Endpoint Privilege Management (EPM). ... Show more

Joe Griffin

Joe Griffin

Joe Griffin is CEO of proMX UK Limited, a Microsoft Inner Circle partner within the proMX group of companies. As a holder of over 40+ Microsoft technical certifications covering the entire Microsoft cloud stack, including Dynamics 365, Power Platform, Microsoft Azure, Artificial Intelligence and more, Joe is a seasoned professional, technical architect and trainer, with a passion for implementing effective technology solutions. Joe's experience covers a variety of industries, including energy, managed services, retail, print & direct mail and the UK utility sector. Joe has been a Microsoft Most Valuable Professional (MVP) since 2020, and contributes regularly at conferences and user groups across the globe. When Joe is not working, he enjoys reading, learning about history, walking, video games and catching up with the latest film and TV shows.

Joe Griffin is CEO of proMX UK Limited, a Microsoft Inner Circle partner within the proMX group of companies. As a holder of over 40+ Microsoft technical certifications covering the entire Microsoft cloud stack, including Dynamics 365, Power Platform... Show more

Roberto Navarro

Roberto Navarro

Soy Roberto Navarro, Ingeniero Informático de profesión y por suerte de vocación y MVP en IA, llevo cerca de 20 años trabajando en el sector, y durante los últimos 7-8 dedicándome a tareas relacionadas con el BigData y la IA en Azure, aunque siempre me pico el mundillo este de contar cosas, de ayudar a la gente a meterse es este mundo hyper-loco, así que hace como unos 3 años me metí más de lleno en la “comunidad”, realizando charlas en diversos eventos de Azure, como el GlobalAIBootcamp, NetCoreConf, GlobalAzure, etc. escribiendo algún que otro post, mi propio canal de Youtube, etc. y aquí estoy ahora, como Evangelist en donde parte de mi trabajo es precisamente este, el de ayudar a la gente y las empresas a entender este mundo tan loco de los datos, la IA, etc.

Soy Roberto Navarro, Ingeniero Informático de profesión y por suerte de vocación y MVP en IA, llevo cerca de 20 años trabajando en el sector, y durante los últimos 7-8 dedicándome a tareas relacionadas con el BigData y la IA en Azure, aunque siempre ... 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

YK Sugi

YK Sugi

Developer Experience Manager at Eventual. Also the creator of an open-source coding assistant with ~1200 stars on GitHub, and a Claude Code tips repo with 8000+ stars. Founder of CS Dojo, a programming education YouTube channel with 1.9M+ subscribers.

Developer Experience Manager at Eventual. Also the creator of an open-source coding assistant with ~1200 stars on GitHub, and a Claude Code tips repo with 8000+ stars. Founder of CS Dojo, a programming education YouTube channel with 1.9M+ subscribers... Show more

Michel Murabito

Michel Murabito

I'm Michel Murabito, Mich to my friends! Born in 1986 in Turin with Sicilian roots, I now live in Milan. My journey in software began at 12, coding for fun. At 18, I started my first job as a software developer and have continuously sought new challenges to grow and learn. Today,

I'm a Tech Evangelist @Fractal Cloud and a Cloud Native Computing Foundation (CNCF) Ambassador, sharing my passion for cloud native technologies with a community of curious minds. I'm also an organizer of the Cloud Native Days Italy (formerly KCD Italy) and KCD San Francisco Bay Area, fostering collaboration and innovation within the cloud native ecosystem.

I'm Michel Murabito, Mich to my friends! Born in 1986 in Turin with Sicilian roots, I now live in Milan. My journey in software began at 12, coding for fun. At 18, I started my first job as a software developer and have continuously sought new challe... Show more

Julia Furst Morgado

Julia Furst Morgado

Julia helps teams improve system reliability, observability, and scalability by guiding the adoption of modern infrastructure and operational practices.
Beyond her work, Julia is a a Community Manager to the OpenTelemetry project, CNCF Ambassador, AWS Container Hero, Docker Captain, Google Women Techmakers Ambassador, and Girl Code Ambassador. She’s an active community leader who helps organize KCD NY, AWS Community Day NY, and the Cloud Native Meetup NYC.

Julia helps teams improve system reliability, observability, and scalability by guiding the adoption of modern infrastructure and operational practices. Beyond her work, Julia is a a Community Manager to the OpenTelemetry project, CNCF Ambassador, A... Show more

Daniel Madalitso Phiri

Daniel Madalitso Phiri

Daniel is an advisor and developer with a specialisation in web technologies and open-source tooling. He works in Developer Experience at Weaviate, an open-source AI-Native vector database.

Daniel is an advisor and developer with a specialisation in web technologies and open-source tooling. He works in Developer Experience at Weaviate, an open-source AI-Native vector database. Show more

Stas Lebedenko

Stas Lebedenko

Stas Lebedenko is a full-stack cloud architect and platform engineer at Solidify AB. He is also a co-organizer of the Odesa Microsoft. NET User Group, a speaker and author, and an active member of the international and Ukraine .NET/Azure/Operations communities. He has been building and designing software for the last twenty years and has been the Microsoft Azure Most Valuable Professional since 2020.

Stas Lebedenko is a full-stack cloud architect and platform engineer at Solidify AB. He is also a co-organizer of the Odesa Microsoft. NET User Group, a speaker and author, and an active member of the international and Ukraine .NET/Azure/Operations c... Show more

Valeria Salis

Valeria Salis

As a Green Software Advocate and Tech Sustainability Consultant, my mission is helping companies and professionals build more sustainable, low-carbon digital solutions. Since discovering technology's environmental impact in early 2023, I've become a recognized speaker at major tech conferences and co-founded Green Software Italia community. I believe in responsible technology that creates positive impact for both businesses and the environment.

As a Green Software Advocate and Tech Sustainability Consultant, my mission is helping companies and professionals build more sustainable, low-carbon digital solutions. Since discovering technology's environmental impact in early 2023, I've become a ... 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

Paul Turley

Paul Turley

Paul is a Consulting Director & the Fabric Capabilities Owner for 3Cloud Solutions, and a 16-year Microsoft Data Platform MVP. He consults, writes, speaks, teaches & blogs at SqlServerBI.blog about business intelligence and reporting solutions. He works with companies around the world to model data at enterprise scale, visualize and deliver critical information to make informed decisions using the Microsoft data platform. He is a user group leader in the Portland/Vancouver metro area. As a published author on Power BI, Fabric, TSQL, SSAS & SSRS, he holds several Data Platform credentials and all current Fabric & Power BI certifications.

Paul is a Consulting Director & the Fabric Capabilities Owner for 3Cloud Solutions, and a 16-year Microsoft Data Platform MVP. He consults, writes, speaks, teaches & blogs at SqlServerBI.blog about business intelligence and reporting solutions. He wo... Show more

Barret Blake

Barret Blake

Microsoft MVP, husband, father, speaker, mentor, writer, architect@NimblePros, developer, former manager, gamer, LEGO enthusiast, Buckeyes fan, model railroader. When I'm not doing all that other stuff I also occasionally develop applications. Find links to my previous speaking, podcasts and sessions at my website: https://barretblake.dev

Microsoft MVP, husband, father, speaker, mentor, writer, architect@NimblePros, developer, former manager, gamer, LEGO enthusiast, Buckeyes fan, model railroader. When I'm not doing all that other stuff I also occasionally develop applications. Find l... Show more

Kenneth van Surksum

Kenneth van Surksum

As a Microsoft 365 Modern Workplace consultant I help customers implement modern workplace solutions based on top of their Microsoft 365 licensing, leveraging products like Microsoft Intune, Microsoft Entra, Microsoft Defender, Exchange Online, Microsoft Teams, Microsoft SharePoint and Microsoft Purview. I constantly build solutions which span these products, taking into account Security, Usability and Manageability as main pillars.

Currently I'm also responsible for the delivery of Secure At Work, a product which can automatically provision Microsoft 365 tenants with best practices configuration and once onboarded keeps customers up to date by using regular releases. Each release adds or updates functionality in Microsoft 365 environments based on best practices and lessons learned from implementation feedback. The Secure At Work solution is already running om more than 10K endpoints, making it proven solution and able to cover 80% of business requirements.

With more than 25 years of experience in IT, I managed to get myself Microsoft certified in 1998, eventually becoming a Microsoft Certified Trainer (MCT), en ultimately receiving my first Microsoft MVP award in 2010. Currently I am a proud dual Microsoft MVP for Microsoft Intune and Identity and Access.

In the past I have worked with many products in the Microsoft infrastructure space, like SMS/System Center Configuration Manager, Active Directory, Virtualization (both VMware as Hyper-V), System Center products like SCOM, SCSM, SCVMM, SCDPM among others.

Kenneth regularly shares his knowledge by blogging at https://www.vansurksum.com and by speaking on national and international events.

As a Microsoft 365 Modern Workplace consultant I help customers implement modern workplace solutions based on top of their Microsoft 365 licensing, leveraging products like Microsoft Intune, Microsoft Entra, Microsoft Defender, Exchange Online, Micro... Show more

Michael Johnson

Michael Johnson

Michael Johnson is a Microsoft Data Platform MVP and co-lead of the Johannesburg Data Platform User Group. Professionally, he is the owner and principal consultant at Cobalt Analytics, based in Johannesburg, South Africa. Michael regularly presents at many local and international user groups and conferences on topics including data engineering and analytics.

Michael Johnson is a Microsoft Data Platform MVP and co-lead of the Johannesburg Data Platform User Group. Professionally, he is the owner and principal consultant at Cobalt Analytics, based in Johannesburg, South Africa. Michael regularly presents a... Show more

Spencer Schneidenbach

Spencer Schneidenbach

Spencer Schneidenbach is an AI Architect, President, and CTO of Aviron Labs, an AI and software development firm based in the United States. He has been recognized as a Microsoft MVP for his AI expertise and contributions to the community. Visit our website at https://avironlabs.com for more information.

Spencer Schneidenbach is an AI Architect, President, and CTO of Aviron Labs, an AI and software development firm based in the United States. He has been recognized as a Microsoft MVP for his AI expertise and contributions to the community. Visit our ... Show more

Pauline Kolde

Pauline Kolde

Always on the road — in search of inspiration, good food, and the next interesting conversation.

I'm a Microsoft MVP and consultant with over 8 years of experience in Dynamics 365 and Customer Experience.
My sweet spot is Dynamics 365 Customer Insights and Dynamics 365 Sales, but I'm equally at home talking about AI, Copilot, and where it's all heading. I'm driven by curiosity, about technology, about people, and about the spaces in between.
That curiosity also shapes the sessions I love to give. Alongside deep-dives into Microsoft tech, I design talks on mindset and methods: from building a Second Brain to applying Street Epistemology, the Socratic questioning practice, in everyday professional life.

When I'm not on stage or on a client project, you'll find me somewhere in the world with a knitting project in my bag, great company around the table, and probably too many browser tabs open.

Always on the road — in search of inspiration, good food, and the next interesting conversation. I'm a Microsoft MVP and consultant with over 8 years of experience in Dynamics 365 and Customer Experience. My sweet spot is Dynamics 365 Customer I... Show more

Julian Kusenberg

Julian Kusenberg

Julian Kusenberg is a Microsoft MVP and Senior Consultant at SoftwareOne AG and an expert in Microsoft 365 compliance, with a particular focus on Microsoft Purview. In his role, he supports organizations in implementing holistic security and governance strategies – from deploying sensitivity labels to Insider Risk Management, Data Loss Prevention, and eDiscovery.

With an academic background in physics from Heinrich Heine University Düsseldorf, Julian combines analytical thinking with deep technical expertise. Previously, he worked at FTI Consulting, where he played a leading role in international Microsoft 365 compliance projects for clients across industries such as manufacturing, the public sector, healthcare, and non-profit organizations.

His focus lies in the practical implementation of compliance frameworks within Microsoft environments, the development of information protection strategies, and the intelligent use of automation and governance features. Julian is a regular speaker at conferences, known for presenting complex technical topics in a clear, structured, and practical manner.

Julian Kusenberg is a Microsoft MVP and Senior Consultant at SoftwareOne AG and an expert in Microsoft 365 compliance, with a particular focus on Microsoft Purview. In his role, he supports organizations in implementing holistic security and governan... 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

Imma Valls

Imma Valls

Imma is a Staff Developer Advocate at Grafana Labs, passionate about simplifying Observability, OpenTelemetry, and Cloud-Native technologies. In her past life, she worked as a consultant, trainer, and support engineer at @elastic, and was a proud organizer of Software Crafters Barcelona from 2018 to 2025.

She currently focuses on creating accessible technical content and driving the adoption of best practices within the community. She is deeply committed to clean code and the art of automation.

She is also a passionate community builder and ally. As a WomenInAPIs champion, she advocates for underrepresented groups being seen and heard in the public domain. You will find her co-organizing Grafana meetups in Barcelona, Madrid, Amsterdam, Stockholm, Zurich, and Lisboa; Cloud Native Barcelona; DevOpsDays Barcelona, Green Software Barcelona; and TechFems.

She is an aquafitness enthusiast and a huge Bruce Springsteen fan. No surrender!

Imma is a Staff Developer Advocate at Grafana Labs, passionate about simplifying Observability, OpenTelemetry, and Cloud-Native technologies. In her past life, she worked as a consultant, trainer, and support engineer at @elastic, and was a proud org... Show more

Phil Nash

Phil Nash

Phil is a developer relations engineer for IBM and Google Developer Expert living in Melbourne, Australia. He's been working in developer relations for a decade, speaking at conferences since 2012, and writing JavaScript since before jQuery. Away from the keyboard, Phil enjoys travel, live music, and hanging out with his mini sausage dog, Ruby.

Phil is a developer relations engineer for IBM and Google Developer Expert living in Melbourne, Australia. He's been working in developer relations for a decade, speaking at conferences since 2012, and writing JavaScript since before jQuery. Away fro... Show more

Fabian Bader

Fabian Bader

Fabian Bader is a Cyber Security Architect and Microsoft MVP from Germany. He focuses on security and cloud solutions and works mainly with Microsoft technologies.
From Azure cloud to on-premises Active Directory, he likes to automate stuff with PowerShell.

Besides being a speaker at conferences and community events, he blogs at "cloudbrothers.info" and hosts "Purple Elbe Security User Group" and "Hamburg PowerShell User Group".

❤️ PowerShell and Security 🛡️

Fabian Bader is a Cyber Security Architect and Microsoft MVP from Germany. He focuses on security and cloud solutions and works mainly with Microsoft technologies. From Azure cloud to on-premises Active Directory, he likes to automate stuff with Pow... Show more

Paulina Jędrzejewska

Paulina Jędrzejewska

Paulina specializes in data modeling and automation in Power BI. She also has experience with data warehousing, SQL, and ETL.

"I got to know Power BI during my studies and it was love at first sight. I'm amazed how powerfull this tool is and that it is becoming better every month. As a consultant and trainer, I have the opportunity to inspire my clients and show them that Power BI is more than just colorful reports."

Paulina specializes in data modeling and automation in Power BI. She also has experience with data warehousing, SQL, and ETL. "I got to know Power BI during my studies and it was love at first sight. I'm amazed how powerfull this tool is and that ... 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.