Executives

Starting as a research and development scientist when he joined Particle Measuring Systems in 1995, Mr. Mitchell discovered that he enjoyed working with customers to solve their problems. As a result, he became more involved in the commercial aspects of the business. After holding positions at the company in various other capacities, Mr. Mitchell was appointed president of Particle Measuring Systems. He has written and presented more than 25 technical papers around the world and is the inventor or co-inventor on 10 patents. Outside of work, Mr. Mitchell enjoys spending time with his family and golfing.

Mr. Knollenberg provides performance-leading solutions to the microelectronics, display and industrial sectors. In his more than 15 years at Particle Measuring Systems, Mr. Knollenberg has held a variety of technology and leadership roles in product development, global applications and general management. In addition to his experience at Particle Measuring Systems, Mr. Knollenberg has held marketing and business leadership positions in the thin film vacuum process equipment industry. Mr. Knollenberg is actively involved in several nonprofit organizations. Prior to his professional career, he served with the United States Army. When not at work, he spends time in the mountains hiking, fishing and spending time with family.

Ms. Nasta joined Particle Measuring Systems in January 2019 as Vice President of Human Resources. Her background in strategic planning, cultural transformation, compensation programs, benefits and rewards, and organizational development spans multiple business sectors, settings, and industries including leadership experience at Wells Fargo, Shell Oil, Noodles & Company and Rocky Mountain Institute. Ms. Nasta holds Bachelor’s degrees in English and Business and an MBA from the University of South Dakota. Outside of work, Ms. Nasta enjoys staying active with her three kids and dog, trail running, and traveling.

Mr. Kibe joined Particle Measuring Systems in April 2017 and is responsible for the company’s Global Legal, Ethics and Compliance functions. Mr. Kibe has a Bachelor of Science degree in Environmental Engineering from the United States Military Academy and has his Juris Doctor from the University of Colorado School of Law. Mr. Kibe served in the United States Army and worked in sales prior to law school. He has practiced law for the last 16 years with 3 years being spent at a law firm in Denver and the 10 years prior to joining Particle Measuring Systems supporting two Fortune 250 companies as in-house counsel. When not at work, he enjoys spending time with his family and spending time outdoors.

Ms. Allen has worked in a variety of Accounting and Financial Planning & Analysis roles in her more than 10 years at Particle Measuring Systems, including Senior Accountant, Senior Business Partner, Manager and Director of FP&A. She holds a BBA in Accounting as well as a BBA in Finance, holds active CPA licenses in multiple states, and prior to her tenure at PMS, she was an auditor for Pricewaterhouse Coopers. In her current position, she enjoys developing business intelligence for corporate key decision making, cross-functional collaboration and problem solving.

Outside of work, Ms. Allen enjoys Friday night movie nights with her family, trail cycling, and extended-family summer pool parties.

Mr. Gromala has worked in a variety of roles during his more than 14 years with Particle Measuring Systems, including western sales manager, applications engineering manager and director of service. In his current position, he enjoys corporate strategy development and implementation with a focus on technology and intellectual property creation. Mr. Gromala’s career spans more than 25 years in the field of lasers and electro-optic technology, and he holds degrees in Engineering and Business. Outside of work, Mr. Gromala enjoys spending time with his family, exercising, playing the guitar and reading history books.

Mr. Panofen has an established foundation as a well-recognized and successful Leader in the Life Science industry, driving the sterility assurance business. He has wide-ranging experience in the field of applied pharmaceutical microbiology and has been an invited speaker at international conferences including ECA and PDA, with a strong regulatory background in pharmaceuticals. He is a certified Microbiological Laboratory Manager from ECA.