Rocky Mountain Instrument Co.

About RMI » Management

RMI is led by the father-son team of Steve and Dr. Hahn. Along with a close-knit team of engineers, technicians, scientists, and business professionals, RMI has built a strong reputation as a total solutions provider in the optics industry.


Steve Hahn: CEO

RMI has been a significant part of Steve’s life ever since he can remember. Entering the company in 2000, Steve took on numerous project management and leadership roles, utilizing his background in creative high-tech sales and marketing. Prior to RMI, he worked in sales and business development at Sun Microsystems (now Oracle). Steve earned an MBA in Management and Entrepreneurship from the University of Colorado Boulder and a BA in Economics from Tufts University. He has been CEO since 2010.



Dr. Yubong Hahn: Founder & Chief Scientist

As a renowned expert in thin-film coatings, Dr. Hahn has been RMI’s technical and visionary force since he acquired the company in 1983. He has founded several other leading companies in the laser and photonics industry and remains passionate about advancing a wide range of photonics technologies. Dr. Hahn earned his Ph.D. and MS in Physics from the Missouri University of Science and Technology and a BS in Physics from West Virginia Wesleyan College. 



Greg Minton: Vice President, Corporate Affairs

Since 2006, Greg has served RMI on a wide range of corporate affairs issues including contracts, ITAR training, safety, licensing, document control, government regulation, and intellectual property. Greg possesses a wide range of experiences and a unique blend of legal, business, and scientific backgrounds. An alumnus of 3 Colorado universities, Greg earned a BA in Philosophy from the University of Colorado Boulder, a JD from the University of Denver, and an MS in Geology from the Colorado School of Mines.

Gillsu Im: Director, Coating Technology

An optical coatings specialist with an extensive background in physics, Gillsu has been a leading member of the RMI coatings team for over 15 years. Although he has resided in Colorado for almost two decades, Gillsu was born and raised in Seoul, Korea where he graduated from Hanyang University with a Bachelor's Degree in Physics. Prior to joining RMI, Gillsu managed the coating department at Seoul Optical, one of Korea's oldest and most prestigious optical companies.

Thomas Frotten: Director, Advanced Materials

A native of Boston and a Chemical Engineering graduate from Tufts University, Thomas joined RMI in 2007. Formally the Quality & Production Manager at Rohm and Haas (now Dow Chemical), Thomas is an expert in quality manufacturing, material science, and supply chain management. His high level of experience in Chemical Vapor Deposition (CVD) materials technology has led him to develop RMI's advanced IR materials production program.

Corri Klingsmith: Director, Finance & Controller

Corri joined RMI early on in her career shortly after graduating from the University of New Mexico with a Bachelor's Degree in Accounting. Through her meticulous attention to detail and her passion for her field, Corri has been the accounting and finance backbone of RMI for over 10 years. A New Mexico native, she was born in Sante Fe and has resided in Colorado for the last 10 years, becoming an avid fan of the CU Basketball team where her husband works on the staff.

Rae Hunt: Director, Sales & Customer Support

With over 25 years of service at RMI under her belt, Rae has developed the highest level of expertise in optics sales and account management, resulting in her ability to provide the best support to customers. With a keen understanding of the industry, Rae serves customers across the military, medical, R&D, and industrial laser markets. In addition to being a veteran member of the RMI team, Rae is also a Colorado native who is proud to call the Rocky Mountain state her one and only home.

Heath Kirin: Director, Business Development

Bringing with him years of experience in sales and leadership as well as optical engineering, Heath joined the RMI sales team in 2006. Developing a customer base that spans across the US as well as the continents of Europe, Asia, South America, and Australia, Heath quickly became a leader among the RMI sales team. Currently residing in California, Heath was born in Colorado and graduated from the Colorado School of Mines with a Bachelor's Degree in Electrical Engineering.