Management Team

David Crozier

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

Director of Operations

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

Machine Shop Manager

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.