Leadership Team

Dimple Shah is President and Chief Executive Officer of Gamma Technologies (GT) since November, 2020. He assumed the mantle from our visionary founder, Dr. Tom Morel, who now serves as Chairman of the GT Board of Directors. With 30 years of experience and an enthusiast of simulation technologies, he has collaborated with pioneers across diverse industries transforming the state of the art for the digital development of complex products and systems. Prior to GT, he held executive global leadership roles in software organizations and his professional journey has been shaped by experiences that transformed a CAE startup (HKS, Inc.) into an exciting growth company (Abaqus, Inc.), and later to the development of a premier simulation brand (SIMULIA) at Dassault Systèmes. He is passionate about making CAE the preferred way to drive industry innovation and create a more sustainable future for the next generation. He is a member of the Governing Board of Directors at the Bulletin of the Atomic Scientists.


Originally from Pune, India, Mr. Shah lives in Chicago, Illinois, with his family. He earned his bachelor’s degree in mechanical engineering from COEP Technological University in Pune and a master’s degree in mechanical engineering from Stony Brook University in New York.

Dr. Morel co-founded Gamma Technologies in 1994 with the vision of developing a unique CAE simulation tool combining many physical domains to address modeling of whole vehicles and of their powertrains. Having first focused on internal combustion engines with GT-POWER, GT rapidly dominated the market. The state-of-the-art software quickly expanded to simulate other systems such as thermal management, fluid systems, multi-body mechanics, electrical systems and fully integrated systems, giving rise to GT-SUITE, the company’s flagship product. Today, engineers around the globe use GT-SUITE to optimize products in many industries, including automotive, aerospace, industrial machinery, power generation and more.

In recognition of his contributions, Dr. Morel was elected a member of the National Academy of Engineering (NAE), one of the highest professional honors given to an engineer.

Syed Wahiduzzaman is a founding member of Gamma Technologies where he currently serves as a Senior Vice President. He also leads a team of engineers for development of models and simulation tools for the exhaust gas aftertreatment systems (SCR, LNT, TWC, DOC, DPF, CPF, etc.), port-injection and fuel puddling phenomenon for the current generation engines, fuel cells, fuel reformers, chemical and process system simulation. His is responsible for development of advanced combustion models for low carbon fuels and eFuels GT-SUITE, as it relates towards the goal of achieving net-zero emissions. Other research activities include development of embeddable model calibrations and optimization technologies and productivity tools for GT-SUITE.

Syed finds taking long walks every day to analyze what he could have done better and generate new ideas for the emerging challenges.

Rifat Keribar is a co-founder of GT one of the original developers of the GT-SUITE software. He currently leads product and R&D teams focused on mechanics, NVH and tribology aspects of GT SUITE and their integration into GT multi-physics solutions. Rifat has more than 40 years of experience focusing on computer-aided engineering, simulation and R&D, primarily in Automotive Engineering, and a record of technical leadership and managerial positions. He is the author of more than 40 technical publications and has been recognized by several SAE and international awards for his work. Prior to GT, Rifat spent 4 years at GATX and 11 years at ITI/Ricardo-USA. Rifat holds a PhD degree in Mechanical Engineering from Northwestern University.

Rifat enjoys the best of what Chicago has to offer including the lakefront where he bikes and takes long walks, as well as his extended family. Among his enjoyable challenges outside work is the uphill battle to maintain his cool granddad status.

Mariya Akmal has led finance functions at private equity backed and public companies. Prior to that, she was a leader in the corporate finance and strategy practice at the Boston Consulting Group where she led client work with a wide variety of software, auto and non-auto companies, helping them solve tough challenges and realize growth in an increasingly competitive and dynamic environment.

Mariya holds an undergraduate degree in accounting and an MBA from University of Chicago.

Iakovos Papadimitriou is responsible for the vision, development direction and execution for the GT product portfolio. He started his career as a developer at Gamma Technologies in 2003 and has over the years led various R&D projects ranging from concept-stage vehicle architecture analyses to real-time physical modeling for ECU validation. He has also been heavily involved in strategic partnership and acquisition activities that have built the current simulation ecosystem around GT-SUITE. Iakovos holds a Dipl-Ing from the National Technical University of Athens, a M.S. degree in Mechanical Engineering as well as a Management of Technology Certificate from the University of California, Berkeley.

A car and motorsports fan from an early age, Iakovos is known for wearing out his tires and brake pads way too frequently, although rumor has it that he has mellowed after he heard the word “dad” for the first time!

Michael Nisenson joined Gamma Technologies as Chief Revenue Officer in 2026 and will head GT’s global go-to-market teams, driving growth in emerging technologies and lead GT into its next era of global expansion, bridging new industries, enterprise partnerships, and scaling the company’s presence across key international markets.

Nisenson joins GT following an accomplished 15+ year career at ANSYS, where he most recently served as Global Vice President of New & Emerging Technologies, after holding multiple senior leadership roles across North America, strategic accounts, major global markets, and advanced technology portfolios.

Matt is currently acting as VP of Operations for Gamma Technologies, where he has worked for 22 years. In this role, he is responsible for ensuring smooth operations at GT, which means he gets involved in a variety of projects across the organization targeted at continuously improving GT’s internal tools and processes. Matt has direct responsibility for Applications Engineering, IT, and Quality Assurance. In previous positions at GT, Matt has worked as an application engineer supporting engine performance and as a team leader for the thermal management application engineering team. Prior to working at GT, Matt spent 5 years at Detroit Diesel in Detroit, MI serving various roles in product engineering and quality assurance. He hold a B.S. in Mechanical Engineering from the University of Illinois in Urbana-Champaign, and a M.S. in Mechanical Engineering from the University of Michigan in Dearborn.

When Matt is not going cross-eyed digging into a detailed spreadsheet, he can be found cycling, kayaking, or water skiing with his family.

Dan Marsh was promoted to a newly created position at GT in 2026, Vice President of AI Strategy and Enterprise Systems. Dan brings deep expertise in enterprise software, platform strategy, and scaling customer‑centric SaaS solutions.

Marsh, a 16‑year veteran of Gamma Technologies, brings a uniquely blended background in engineering simulation, user experience innovation, and enterprise systems leadership. Throughout his career at GT, he has played a central role in building the foundation on which GT’s AI‑first future is emerging.

“Dan is passionate about STEM education and enjoys helping his children build curiosity and problem-solving skills, while observing how naturally the next generation integrates technology into everyday life, frequently by resisting instructions”