Lockheed Martin Missions Systems and Training, Baltimore, Maryland, is being awarded a $52,453,589 performance-based logistics, firm-fixed-economic price adjustment, indefinite-delivery requirements-type contract for supply chain management of aviation tires supporting the following aircraft: P-3C, E-2C/D, C2, AV-8B, CH-46E, F-18A/B/C/D/E/F, EA 18-G, MH-60S/R, SH60B/F, S-3, EA-6B, CH-53/E, V-22, and F-35.  The contractor is responsible for requirements forecasting, inventory management, retrograde management, storage, transportation, and meeting critical supply response time availability metrics.  This contract involves a combined effort between the Navy (85 percent); and the countries of Australia, Bahrain, Brazil, Egypt, France, Greece, Italy, Korea, Spain, Taiwan, Turkey Japan, and the United Kingdom (15 percent) under the Foreign Military Sales program.  This is a three-year contract, with two six-month option periods and also an option for increased quantity for F-35 tires, which if exercised, brings the total estimated value to $131,067,492.  Work will be performed in Baltimore, Maryland, and is expected to be completed by January 2019.  No contract funds will be obligated at the time of award, and funds will not expire at the end of the current fiscal year.  Working capital funds (Navy) will be obligated as individual orders are issued.  This contract was competitively procured with the solicitation posted to the Federal Business Opportunities website, with two offers received.  Naval Supply Systems Command Weapon Systems Support, Philadelphia, Pennsylvania, is the contracting activity.