 | Matthew BrummettMatthew (Matt) Brummett joined the contract support team to NA-71 in January 2025. Matt has 25 years’ experience in the nuclear industry with 20 years’ experience working in Material Control and Accountability (MC&A). His various roles and job duties have included technical measurements; material control oversight as a material balance area custodian; and program compliance dealing with procedures, issues management, site MC&A plan revisions, and performance testing. Most recently he was an MC&A representative on the Uranium Processing Facility Project at Y-12. He is a member of the Institute of Nuclear Material Management and has been a past member-at-large for the Central Region Chapter. |
 | Wilder GreeneWilder Greene has a background in environmental science and applied statistics. His experience spans radiological control, industrial hygiene, measurement/statistics roles at Los Alamos National Laboratory, and quality engineering/data science at Sandia National Laboratories. He enjoys traveling, outdoor activities, tech, and film. |
 | Denise “Dee” HessDenise (Dee) Hess is a safeguards and security specialist supporting National Nuclear Security Administration (NNSA) MC&A, with over 35 years of experience across the DOE complex, including Mound of Ohio and Y-12. An Army Reservist and Military Police veteran, she finds the MC&A community a dedicated group of professionals who truly care about their work and take pride in what they do. It is a field she values deeply and continues to grow in alongside others dedicated to the work. Dee lives in Kingston, Tennessee, with her horses, Todd and Cash, and enjoys traveling, trail riding, camping, and spending time with her Aussiedoodle, Dolly. |
 | Geneva JohnsonGeneva Johnson has been a part of the MC&A world for 40+ years. She has served as MC&A manager at Nevada National Security Site and the safeguards manager at Oak Ridge National Laboratory, after beginning her career in MC&A at Y-12. She has worked on several contract changes for MC&A purposes for various sites and has assisted as the MC&A oversight at Idaho National Laboratory. She has participated in the nonproliferation international nuclear material safeguards and security cooperation, including work with Russia. She has assisted with many sites’ MC&A programs and now supports NA-71 in training, oversight, and documentation efforts. |
 | Lori LashLori Lash spent 21 years in Safeguards & Security at Los Alamos National Laboratory, where she held leadership roles in the Protective Force and Environment, Safety, Health, and Quality. She later served 6 years as the Performance Assurance manager for the MC&A group. After retiring from LANL, she became a contractor and now manages the NNSA MC&A Technical Qualification Program. |
 | Erik MartinezErik Martinez is a senior MC&A specialist supporting NA-71 and has worked in nuclear MC&A since 2015. His roles at Los Alamos National Lab and Sandia National Labs included accounting, measurements, physical inventory, and program management. Additionally, he has taught courses to the DOE community for the DOE National Training Center. Outside of work, Erik is a car enthusiast and enjoys maintaining his saltwater aquarium, traveling, and spending time with family. |
 | Frannie WarringtonFrannie Warrington graduated from Clemson University where she received her BA in communications. Since then, she has worked in program and logistics management. She is nearing 5 years in the field. Currently, she works as a mission implementation specialist at Oak Ridge National Laboratory supporting multiple NNSA projects, with the most important being the NNSA MC&A Summer Academy. |
 | Amy WhitworthAmy Whitworth is the MC&A functional area manager for NNSA and has over 30 years of experience in nuclear security. She has led MC&A policy development, field support, program assessments, and international security engagements. She holds degrees in applied mathematics and probability and statistics, and she is an Institute of Nuclear Material Management Fellow. |