Michael Stahnke is a seasoned technology leader and open-source advocate, currently serving as the VP of Engineering Flox. With experience in leading operations and engineering departments, Michael has played a pivotal role in shaping DevOps practices and automation in software development. Prior to joining Flox he held senior leadership positions at CircleCI and Puppet, where he built and led engineering teams solving problems for developers and operations. He is a regular speaker at technology conferences, sharing insights on DevOps transformations, scalability challenges, and the future of automated workflows. He’s obsessed with measurements of engineering performance and finding a great night of karaoke.

You can find Michael on the following sites:

• LinkedIn
• GitHub
• Bluesky

Here are some links provided by Michael:

• Flox

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Coffee and Open Source is hosted by Isaac Levin

Keith Townsend is an independent CTO advisor and infrastructure practitioner focused on how enterprises actually adopt AI, cloud, and open-source platforms at scale. He’s the founder of The Advisor Bench and the voice behind The CTO Advisor, where he helps CIOs and CTOs navigate hard infrastructure decisions around hybrid cloud, AI systems, and platform architecture.

Keith has spent his career inside large enterprises and alongside vendors—working as an enterprise architect, consultant, and analyst—bridging the gap between engineering reality and executive decision-making. He’s known for translating complex systems into plain English and for challenging hype with operational truth.

Today, Keith advises enterprise IT leaders, moderates closed-door executive forums, and builds real AI systems himself—using open source not as ideology, but as a practical tool for control, portability, and long-term leverage.You can find Keith on the following sites:

• Blog
• YouTube
• LinkedIn
• X

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Coffee and Open Source is hosted by Isaac Levin

• LinkedIn
• GitHub
• Bluesky

• Oh My Posh

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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com

Coffee and Open Source is hosted by Isaac Levin

Kat is the Head of Developer Advocacy at Minimus, focused on the growth and nurturing of open source through authentic contribution. In particular, her specialties are approachable 101-level content and deep dives on the history of technology, with a focus on DevOps and cloud native. She was the Kubernetes Release Lead for 1.30 Uwubernetes, and currently serves as a member of the Kubernetes Steering Committee, the Release Team Subproject Lead, and a SIG Docs Tech Lead.

When she’s not at a conference, she spends her time playing video games, watching horror movies, or reading science fiction, but her current hyperfixation is film photography. She lives in Colorado with her cat, Espresso, who is the real brains behind the operation and actually ghostwriting all of her posts.You can find Kat on the following sites:

• Bluesky
• Linktree

Here are some links provided by Kat:

• Minimus

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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com

Coffee and Open Source is hosted by Isaac Levin

Once described on Reddit as “technically challenged”, Sarah is a Principal Security Advocate working at Microsoft. She has lived all over the place but currently calls Melbourne home.

Sarah has been working in cyber security since before it was cool, has previously spoken at many security conferences including Black Hat and has co-authored a few Microsoft Press technical books. She is an active supporter of security communities across the globe and a co-host of the Microsoft Azure Security Podcast.

Sarah spends most of her spare time gaming, taking part in Melbourne's official sport of brunching, taking high tea and spending a disproportionate amount of her income on her dogs.You can find Sarah on the following sites:

• Website
• LinkedIn
• GitHub
• Bluesky
• X

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Coffee and Open Source is hosted by Isaac Levin

Jeff Williams is the Co-Founder and CTO of Contrast Security, where he leads innovation in runtime-based application security. A pioneer in modern AppSec and co-founder of OWASP, Jeff has spent more than two decades helping organizations understand and manage software risk through instrumentation, context, and continuous learning.

You can find Jeff on the following sites:

• LinkedIn
• X

Here are some links provided by Jeff:

• Contrast Security
• Contrast Security X

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Coffee and Open Source is hosted by Isaac Levin

Sydnee leads AI product initiatives at Cribl, the data engine for IT & Security. Prior to joining Cribl, Sydnee was leading hyperscale inference within the CoreAI group at Microsoft. Sydnee is passionate about helping individuals learn and adopt AI safely and responsibly.You can find Sydnee on the following sites:

• LinkedIn

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Coffee and Open Source is hosted by Isaac Levin

Adriana is a CNCF Ambassador, blogger, host of the Geeking Out Podcast, and a maintainer of the OpenTelemetry End User SIG. By day, she's a Principal Developer Advocate at Dynatrace, focusing on Observability and OpenTelemetry. By night, she climbs walls. She also loves capybaras, because they make her happy.

You can find Adriana on the following sites:

• Bluesky
• Blog
• LinkedIn
• GitHub
• Mastodon
• YouTube

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You can check out more episodes of Coffee and Open Source on https://www.coffeeandopensource.com

Coffee and Open Source is hosted by Isaac Levin