About Us - consultants since 2012 - Over 30 years of experience

 Based near Boulder, CO, EPSIM Corporation is a consulting practice serving the public electric utility sector, large energy loads and industrial gas processes. 

The combined expertise and experience in specialty engineering and utility management fosters the incubation of ideas that transcend traditional silos of consulting. As a result, EPSIM is uniquely positioned to develop, implement and manage innovative client solutions aggressively and efficiently.  

   Nils Tellier, PE, founded EPSIM in 2012 to serve the gas process,  cryogenic industries and wholesale electric market customers. He brings thirty years of experience with cryogenic processes - including his NTCI Inc. practice founded in 1996 - and over twenty years with electric utility operations. 

Mr. Tellier is a Professional Engineer licensed in Arizona and Colorado.  He is a retired officer from the French Navy (Groupement Fusiliers Marins) and a volunteer firefighter for Boulder Mountain Fire Protection District.  He is also fluent in French and Spanish.

 Francis Campos received a PhD in chemical physics from Purdue University and did postdoctoral work at the Joint Institute for Laboratory Astrophysics in Boulder, Colorado. He then spent 24 years as an engineer developing and manufacturing magnetic recording heads for data storage products. His interest in improving the analyses on which decisions were based while adhering to shrinking budgets led him to develop customized calculations and visualizations using freely available statistical packages. He is now independently providing cost efficient, customized analysis to EPSIM customers.