Leigh Ann Hoey

Leigh Ann Hoey

Chief Executive Officer, President
About Leigh Ann

Leigh Ann Hoey, the daughter of Scientific Instruments founder John P. Hoey, has been the Chief Executive Officer and President since 2009. Leigh Ann was the Vice President of Finance of Scientific Instruments for 25 years prior to her current tenure as CEO. Leigh Ann holds a BS in Business Administration from Appalachian State University.

“I am very proud of our family owned and operated company serving various global partners and markets with our expertise in cryogenic measurement for over 50 years.”

Michelle Patruno

Michelle Patruno

Human Resource Director
About Michelle
1-800-466-6031, Ext. 102
Michelle is an accomplished senior level Human Resources and Administrative professional with over 20 years of experience in Human Resources and Administration. Michelle has cross industry experience in developing policies and standard operating procedures, performance management , employee relations and benefit administration as well as administrative functions of complex organizations. Michelle holds an Associate’s Degree in Business Administration from Gibbs college.
Larry Krauss

Larry Krauss

Quality Manager
About Larry
1-800-466-6031, Ext. 108
Larry has over 35 years’ experience in manufacturing as a Quality Assurance Manager related to products for the Military, Aerospace, & Medical industries. Larry is a graduate of Northern Illinois University and holds a Bachelor of Science degree. Larry has a strong background in leading continuous improvement programs and the implementation & management of Quality Management Systems such as IS09001 & AS9100.

Amar Karki

R & D Manager

Dr. Karki earned his Ph.D. in Condensed Matter Physics from Louisiana State University and brings SI over 20 years of experience in Cryogenics and Magnetic Material research. His expertise and interests are in exploration of new materials and techniques which makes a significant impact in the advancement of the modern technology. His focus areas include project design and execution, cryogenics and cryogenic materials compatibility evaluation, prototyping, test systems integration, data acquisition environments, data analysis, instrumentation, and technical support. He has published the results of his scientific works in many peer-reviewed journals.

Kevin Nussair

Kevin Nussair

Director of Engineering
About Kevin
1-800-466-6031, Ext. 117
Over 20 years of experience as Project Engineer, Design Engineer and Program Manager. Earned a MBA from University of Phoenix, along with a BS degree in Electrical Engineering from Jordan University of Science and Technology. He is a registered Professional Engineer (PE) and Project Management Professional (PMP). He is a member of National Society of Professional Engineers (NSPE), International Honor Society in Business and Project Management Institute (PMI), with Lean and Six Sigma training.
Austin Capers

Austin Capers

Sales Director
About Austin
1-800-466-6031, Ext. 105
Accomplished business development professional responsible for the marketing and sales of SI cryogenic temperature sensors, temperature indicator and controllers, aerospace temperature probes and commercial aircraft temperature probe assemblies. Austin is a U.S. Army combat veteran and graduate of Florida State University. He serves as a board member for the Cryogenic Engineering Conference and the Florida State University Student Veterans Alliance Council.


“Tim Bymaster is one of our longest tenured employees. Starting in 1981, Tim began as an Electronics Technician and over the years gained a vast amount of knowledge, experience, and insight. Tim now works as the Lead Technician in our Cryogenic Instrumentation Department. As one of our most experienced employees he has many accomplishments, but he lists his work relating to job procedures (with respect to building and testing) as one of his most prideful and influential. His favorite moments here at SI are those with his fellow employees, where he says the most enjoyable aspect of working at SI is “the family atmosphere” and the camaraderie that comes with it. His most cherished memory was when our founder, Jack Hoey, lent the company car to him. This enabled him to have reliable transportation for him and his young family to travel to Busch Gardens, Florida. We are grateful for Tim and his many years of service to SI!”