Part 4: Unlocking the vault
Submitted by Karen Ballard on August 12, 2025 - 10:15am
A guide to calculating prepayment savings in payment integrity.
5 min read
Zac Kostura
EVP of Product Strategy and Solution Development
Flexnode
As Executive Vice President of Product Strategy and Solution Development at Flexnode, Zak leads product strategy for next-generation data center infrastructure designed to meet the demands of high-performance computing and AI workloads. His focus is on bridging technology, design, and business strategy to shape modular solutions that redefine how compute infrastructure is deployed and scaled.
Mike Fantigrassi
Head of Product
National Academy of Sports Medicine (NASM)
Mike Fantigrassi, MS, MBA, NASM-CPT, CES, PES, CNC, NSCA-CSCS, is a seasoned professional with over 30 years in the health and fitness industry. Throughout his extensive career, Mike has navigated roles ranging from personal trainer and fitness manager to pivotal leadership positions at the National Academy of Sports Medicine (NASM). Since 2010, he has dedicated his expertise to NASM, currently serving as the Head of Product.
Mike is recognized as a subject matter expert in fitness, wellness, and nutrition, and his insights have found their way into books, magazines, and various media outlets. Under his guidance, NASM has introduced numerous initiatives, including courses in wellness, nutrition, and physique enhancement. Mike holds a B.S. in Food and Nutrition from Florida State University and an M.S. in Exercise Science from PennWest University.
Chaz Kramer
Vice President of Product, Fiber & Transport
Zayo
Chaz Kramer serves as Vice President of Product Management at Zayo, where he leads the strategy, roadmap, and lifecycle management for the company’s Fiber & Transport portfolio across North America—including dark fiber, wavelengths, and private networks.
With more than a decade of experience in the digital infrastructure sector, Chaz plays a key role in expanding Zayo’s high-capacity network footprint to serve customers across enterprises, hyperscalers, carriers, and the public sector—and to deliver the advanced connectivity required for AI, cloud, and other next-generation technologies.
Chaz holds a Bachelor of Science in Business from the University of Puget Sound.
Brennen Smith
Head of Engineering
RunPod
Brennen Smith is Head of Engineering at RunPod, building AI-focused GPU infrastructure that powers AI innovation at scale. With 10+ years in distributed systems, cloud architecture, and security, he has led teams delivering critical infrastructure supporting billions of active users. He led the development of Apple’s GPU Edge, expanding Apple’s Edge to support secure realtime workloads globally. He also developed multiple core methodologies used by the telecommunications industry to measure network performance.
Brennen Smith
Head of Engineering
RunPod
Brennen Smith is Head of Engineering at RunPod, building AI-focused GPU infrastructure that powers AI innovation at scale. With 10+ years in distributed systems, cloud architecture, and security, he has led teams delivering critical infrastructure supporting billions of active users. He led the development of Apple’s GPU Edge, expanding Apple’s Edge to support secure realtime workloads globally. He also developed multiple core methodologies used by the telecommunications industry to measure network performance.