(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