(505) 662-4490 info@sigmasci.com

Key Contacts

Program Managers

James Felty
Program Manager
James Felty is a Senior Nuclear Engineer and Program Manager at Sigma Science Inc. In this capacity, he is responsible for the Company’s National Nuclear Security Administration (NNSA) Contracts at Read More
Gary Kellund
Program Manager
Gary Kellund is a Senior Nuclear Engineer and Program Manager for Sigma Science Inc.  He is a well-rounded nuclear engineer with over 30 years of experience in the areas of Read More
Andrew Smith
Program Manager
Andrew (Andy) Smith is the Sigma Science Inc. Program Manager for Oak Ridge.  Andy has a degree in Business Administration and has over 40 years of experience in the nuclear industry Read More

Business Functions

Kimberly Pena
Chief Financial Officer
Kimberly Pena is the Chief Financial Officer for Sigma Science.  She has more than 27 years of experience in financial, accounting, and regulatory compliance, for a variety of public and private Read More
Erlinda Silva
Contracts Manager
Erlinda Silva has joined SSI as our new Contracts Manager. She has over 25 years of experience in Contract, Proposal, Procurement, and Program Management. She has a Bachelor of Art Read More
Natasha Sutherlin
HR Manager
Natasha Sutherlin is the Human Resources Manager at Sigma Science Inc. She has a Bachelor of Science degree in Psychology and a Master of Business Administration degree from New Mexico Read More
Jason Maestas
Business Development / Contracts / Marketing
Jason Maestas supports Business Development and Marketing efforts for Sigma Science Inc. Jason earned both his Bachelors of Business Administration in Marketing and M.B.A from Benedictine University in Lisle, IL.
Ervina Castillo
Executive Assistant
Ervina Castillo, a New Mexico Native from the Navajo Nation, has joined SSI as the new Executive Assistant. Ms. Castillo has a Master’s degree from the University of New Mexico and Read More