Zemax executive team

The diverse backgrounds of our executive team contribute to making Zemax a thought leader in both optics and technology. Our optics, engineering, and business skillsets help Zemax succeed as a cutting-edge software company with expertise in optics.

Mark Nicholson

Chief Executive Officer

Steers the ship
Mark oversees corporate strategic planning for the company. Ever focused on leading-edge applications of optical technology, Mark holds a PhD in plasma physics and spectroscopy and a bachelor’s degree in physics from Imperial College in London. For the past 20 years, Mark has helped Zemax navigate through key inflection points. Prior to that, he worked with Oxford Group and Crosfield Electronics.

Fast facts about Mark

  • He has written or contributed to many of the company’s white papers and Knowledge Base articles.

  • His first motorcycle was an MZ TS 125 and his favorite bikes are Moto Guzzis.

  • He played lead guitar in Roadhouse, Seattle’s premier classic rock cover band.

Find Mark on LinkedIn

S. Subbiah

Chief Product Officer

Drives the product strategy to advance our product offerings
Subbiah leads the product team to develop our virtual prototyping solution to deliver value to our customers while expanding into new markets. Most recently, he held a variety of senior roles over 12 years at ANSYS, including leading Corporate Product Strategy as well as North American Sales and Customer Services. Earlier, Subbiah served as Vice President of U.S. Operations at Fluent Inc. where he played a key role in growing sales via market segmentation. Subbiah loves taking technology products to market, and engaging with customers, R&D teams, and sales teams.

Fast facts about Subbiah

  • He holds a B.Tech. in Chemical Engineering from IIT Madras, India, an M.S.E. in Mechanical Engineering from Univ. of Pennsylvania and a Ph.D. in Mechanical Engineering from the Univ. of Delaware.  He also completed the Executive Program at The Tuck School of Business at Dartmouth.

  • He enjoys reading both the classics as well as new works, tinkering with the emerging electric economy (he and his wife drove from Vermont to Seattle in their electric car to start working at Zemax), and attending music and theater events.

  • On his travel wish list: Tahiti, Outer Space, or any of the religious monasteries in the Himalayas

Find Subbiah on LinkedIn

Sanjay Gangadhara

Chief Technology Officer

Defines how technological innovation is used in helping customers bring optical products to market faster
Tasked with identifying new technology that increases the functionality and capability of all Zemax software solutions, Sanjay leads a cross-functional team of computational physicists and software development engineers. His background in general physics, electromagnetism, and optical system diagnostics has served him well in his various roles at Zemax, including optical scientist, senior analyst, director of research and development, and now CTO.

Fast facts about Sanjay

  • He holds a bachelor’s degree in Chemical Engineering & Nuclear Engineering from UC Berkeley and a PhD in Nuclear Science & Engineering from MIT.

  • His young children have PhDs in being energetic.

  • In his youth, he was named “Most Improved Player” on both his Freshman and Junior Varsity high school football teams.

Find Sanjay on LinkedIn

Dan Hamann

Chief Revenue Officer

Drives the sales and lead-generation machine
Passionate about staying ahead of changing customer buying behavior, Dan identifies new markets and opportunities for Zemax, with an eye toward accelerated revenue growth, increased profitability, and a sustainable competitive advantage. Dan came to Zemax from F5 Networks, where he built a successful global sales team and installed their first full “Cold to Cash” waterfall. He worked previously with Simply Measured and Oralis.

Fast facts about Dan

  • He holds a bachelor’s in Spanish from Colorado State University.

  • He plays the accordion, guitar, and piano.

  • His love of travel takes him far and wide, to such places as Turkey, Cambodia, South Africa, and Europe.

Find Dan on LinkedIn

Jeff deCillia

Chief Financial Officer

Serves as the financial steward for the company
Jeff’s focus at Zemax is driving growth and bottom-line results by infusing speed, flexibility, strategic thinking, and operational efficiency into the organization. Most recently he served as CFO of Donuts Inc., the operator of the largest number of the Internet’s top-level domain names. Prior to that he served as CFO of INRIX, Inc., a global traffic intelligence platform, where he was a key player in the acquisition and integration of INRIX’s largest competitor, and managed significant international operations.

Fast facts about Jeff

  • He holds a bachelor’s degree from the University of Washington Michael G. Foster School of Business and earned his CPA license while working at Deloitte.

  • He enjoys traveling internationally and the food pleasures that such travel offers.

  • When not at work he can be found on the golf course, working out, or otherwise staying active.

Find Jeff on LinkedIn

We use cookies on this website to enhance your user experience, improve the quality of our site, and to show you marketing that is more likely to be relevant to your interests. By continuing to use this website, you consent to the placement and use of cookies as described in our Cookie Policy.