Created by the world's leading surgeons and medical AI technologists,
for patients and providers everywhere


Meet Team Kaliber

Our solutions are the result of a close collaboration between our team of AI technologists and leading arthroscopic surgeons.

Ray Rahman

CEO, Founder

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Ray Rahman is the Founder and CEO of Kaliber Labs. Ray is a serial entrepreneur with decades of experience in private equity, fintech, and big data. He is highly skilled at creating markets for new products and solutions, and has achieved multiple exits. Of his many achievements, Ray is proudest of his work as the structurer and creator of a new asset class, MCBS (micro-credit-backed securities). BRAC MCBS Series 1 achieved a AAA rating and provided entrepreneurial capital to over 1.2 million poor households – and in the years since, Ray’s contributions to BRAC MCBS have helped lift millions of people out of poverty. 


Ray has a B.S. in mechanical engineering and a B.A. in economics from the University of Rochester, and an M.B.A. from MIT Sloan School of Management.

Paul Gabos

Chairman of the Board

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Paul Gabos is Kaliber’s Chairman of the Board. He brings decades of experience in finance and healthcare, including a 15-year tenure as the CFO of publicly-traded Lincare Holdings, Inc., a home healthcare company. Paul is currently a member of the Board of Directors of MEDNAX, Inc., a publicly-traded women’s and children’s care provider, and serves as MEDNAX’s Audit Committee Chairman and member of the Executive Committee. He also serves on the Boards of privately held Life Line Screening Holdings, LLC and Airo Brands, Inc. Previously, Paul served as Chairman of the Board and Audit Committee Chairman of publicly traded Benefytt Technologies, Inc., a developer and administrator of affordable individual health insurance.


Paul holds a B.S. in economics and finance from the Wharton School of the University of Pennsylvania.

Chandra Jonelagadda

Chief Operating Officer

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Chandra Jonelagadda has spent his career redefining what's possible – imagining what could be, unconstrained by what exists. Before turning his attention to leveraging AI to improve minimally invasive surgery as Kaliber's Chief Operating Officer, Chandra's approach to his work led to his involvement in a wide variety of endeavors. As a member of a multidisciplinary team working to aid counterterrorism efforts, he helped build a platform capable of looking for patterns of suspicious activity without compromising civil liberties. He also created a system to better connect states’ child welfare agencies to speed up interstate foster care and adoption placements. Other notable achievements include building high-performance distributed computing platforms, privacy-preserving distributed analytics, and more recently, enterprise-grade applications of ML and AI. 


Chanda received his bachelor’s degree with honors in electrical engineering from the University of Rajasthan and master’s in electrical engineering from Louisiana State University.

Dr. Richard Angelo, MD, PhD

Chief Medical Officer

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As Kaliber’s Chief Medical Officer, Dr. Angelo brings extensive experience in arthroscopy, as well as a longstanding passion for improving surgical skills training. Dr. Angelo is a past President of the Orthopedic Learning Center in Chicago, past President of AANA, past Chair of the AANA Education Foundation, and past Chief of Surgery at Evergreen General Medical Center. He has also served as Clinical Faculty at the University of Washington Department of Orthopedics, as a member of the Board of Trustees for the Arthroscopy Journal, and as a member of Surgicon’s Senior Advisory Board. 


Dr. Angelo received his M.D. from the University of Washington and his Ph.D. from University College Cork for an investigation into a proficiency-based progression curriculum for surgical skills training. He has published over 50 journal articles and book chapters and served as a co-editor for two arthroscopic shoulder textbooks.

Himawan Gunadhi, PhD

Head of Kaliber Asia

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As Head of Talent and Kaliber Asia, Himawan Gunadhi oversees talent acquisition and Kaliber’s Asia strategy and operations. Himawan has a long and successful history building startups in a wide variety of fields – including algorithmic search, visual search and classification, AdTech, marketing automation, and healthcare IT – and has achieved multiple exits. He has extensive experience with both the US and international markets, including Japan, Korea, and ASEAN, and has raised financing from institutional, corporate, and international investors.


Himawan is an adjunct professor of entrepreneurship at the National University of Singapore’s Overseas Colleges and a frequent instructor in international accelerator programs. He has a BBA Honours in Finance from the National University of Singapore, and a Ph.D. in Management Science from UC Berkeley’s Haas School of Business. 

Mark Ruiz

VP of Engineering

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Mark Ruiz has over 16 years of experience in designing and implementing high-performance and data-intensive software systems. At Kaliber, he is a hands-on engineering leader and is responsible for the architecture, design, and implementation of the low-latency, real-time video inference systems and the MeDUSA Machine Learning Platform. In his spare time, he enjoys working on microcontroller projects and spending time outdoors with his two kids.

Ryan Barban