Long Wave Inc., Oklahoma City, Oklahoma (N66001-25-D-0006); and Reliance Construction Co., Cary, North Carolina (N66001-25-D-0007), are each being awarded an estimated $12,478,211 cost-plus-fixed-fee, cost-only, indefinite-delivery/indefinite-quantity, multiple award contract for the development of technology in, and demonstration of, High-Altitude Electromagnetic Pulse hardening processes, testing, and hardness maintenance and hardness surveillance activities. No contract funds will be obligated on the basic awards. Contract funds in the amount of $20,000 will be obligated on the first task orders under each contract utilizing fiscal 2024 other procurement (Navy) funds. Contract funds will not expire at the end of the current fiscal year. Throughout the duration of the awarded contracts, the total obligated amount on orders for all the awarded contracts combined will not exceed $12,478,211. Work will be performed in Patuxent River, Maryland (34%); Oklahoma City, Oklahoma (33%); and Fairfield, California (33%). Work is expected to be completed by December 2029. These contracts were awarded pursuant to a total small business set aside, with two offers received. Naval Information Warfare Center Pacific, San Diego, California, is the contracting activity.