Phone: (406) 531-8322


Our Story
PinnaCal started as a discussion between four aircraft mechanics.  At the time, Montana did not have a calibration provider anywhere in the state and the aviation industry was in need of a local lab.  Mike brought the idea home to Jessie and the work began.  PinnaCal is one of Montana's first ISO 17025 accredited labs and we work with clients across many different sectors including:  aviation, manufacturing, medical device manufacturing, oil and gas, construction, truck and automotive maintenance, and others.

Jessie Ellis holds a B.S. degree in Geology with a focus on Mathematics and is a founder and President of Pinnacal, LLC. She has worked in multiple industries including construction, environmental remediation, and construction materials testing where she was first introduced to metrology. Jessie has been an ASQ Certified Calibration Technician since 2012 and has completed specialized training from industry leaders including Snap-On, Fluke, and Mitutoyo.

Mike Ellis is a certified A&P Mechanic and has over 10 years of experience in the aviation mechanic industry.  He is a founder and Vice President of Pinnacal, LLC. Mike recently left full time aviation maintenance to continue his calibration work at PinnaCal. His knowledge as an aircraft mechanic allows him to bring a unique view to the calibration world and gives him a strong ability to serve our aviation clients in a way most calibration labs cannot. He has completed specialized industry training including Fluke's Precision Pressure Calibration training.