David Crozier
President and Current Chairman of the Board, Mr. Crozier was the former CEO and principal owner of The Pyrometer Instrument Co., the leading manufacturer of commercial instruments and software for temperature measurement when it was sold in 2015.
When he initially acquired Pyrometer in 2002, the business was on the verge of bankruptcy and under his strategic leadership it was swiftly repositioned into a dominant industry performer.
Prior to Pyrometer, Mr. Crozier spent 7 years as CEO of Datacolor International, a $75 million revenues industry-leading manufacturer of instruments, software and systems for color management and control.
Earlier in his career, Mr. Crozier spent 6 years at Teledyne Industries as President of Teledyne Hastings Instruments and chairman of Teledyne’s Interdivisional Engineering Association. Mr. Crozier holds a BSME degree from the University of Cincinnati and an MBA from John Carroll University.
Paul Hsieh
Paul Hsieh (“Shay”) is OPOTEK’s Director of Operations. Mr. Hsieh started at OPOTEK as a production laser engineer in 2005. After six years of working in both production and service, Mr. Hsieh became the Service Manager, with a commitment to ensure that OPOTEK’s end users had a reliable and dependable tunable light source for their research.
In March 2018, Mr. Hsieh stepped up as the Director of Operations. His goal as the Director of Operations is to lead OPOTEK in this commitment to quality, reliability, and customer service.
Mr. Hsieh received his B.S. in Electrical Engineering with a focus in Photonics from the University of California, San Diego. He enjoys sports, music, and movies.
Patrick McCormack
Patrick McCormack grew up in San Diego and graduated from Poway High School in 1986. He started working for GKN Aerospace in 1986 while attending San Diego City College to earn a certificate in Manufacturing Technology.
Mr. McCormack owned and operated his own shop from 1999-2015 and has been a machinist in manufacturing for 32 years. In 2011, he was asked to help put together a plan to set up a machine shop for OPOTEK. He has been working for OPOTEK to establish and manage the machine shop ever since. OPOTEK now manufactures almost all machined components in-house.
In his spare time, Mr. McCormack enjoys riding motorcycles and fishing.
Mark Little
Mark Little received his Ph.D. from Louisiana State University in the field of Chemistry where he used OPOTEK tunable laser technology to research IR MALDI MS applications and fundamentals. He was hired as an application scientist at OPOTEK in 2006 to continue to develop OPOTEK tunable lasers for mass spectrometry applications using funding from the NIH. Upon completion of this research and product development, Mark became the OPOTEK Sales Manager from 2010 to 2018. Due to his deep knowledge of a variety of scientific applications and OPO technology, Mark was instrumental in promoting and developing OPOTEK products for almost a decade.
Mark left OPOTEK in 2018 to join the executive team at Photosound Technologies Inc. to create the business strategy for their photoacoustic imaging product lines. As the Chief Commercial Officer, Mark was in charge of all promotional material, conferences, distributors and customer discovery campaigns. He rejoined OPOTEK full time in 2024 to take over all customer front facing activities as the Director of Sales and Support Services. With his diverse background, Mark brings both scientific application and laser product knowledge to conversations with OPOTEK customers in order to help them pick the best product to meet their research and product integration needs.