Leidos Holdings LDOS has won a prime contract, with a combined potential value of up to $500 million, from the Air Force Installation Contracting Agency to provide environmental services for the Air Force Civil Engineer Center (“AFCEC”).Apart from Leidos, several other contractors were also selected to work under this contract.Per the contract, Leidos will provide design services for Title I and Title II of environmental construction projects, in addition to all kinds of environmental services, which includes the execution of restoration, prevention of pollution and compliance, and conservation of environmental projects.The AFCEC provides responsive, flexible full-spectrum installation engineering services. Its duties comprise facility investment planning, design and production, operations support, real property management, promptness, energy support, environmental compliance and restoration, and audit assertions, acquisition and program management. The unit performs its operations at over 75 locations across the world.According to Jim Moos, senior vice president and operations manager of Leidos' infrastructure and engineering business, the company has had a long-standing alliance with the Air Force and has been offering essential solutions for the AFCEC's environmental and other missions.Leidos Holdings specializes in providing science and technology solutions. The company operates under four segments: Defense Solutions; Health, Energy and Civil Solutions; Intelligence and Cybersecurity Solutions, and Corporate and other. It serves in the areas of national security, engineering and health.Zacks Rank and Key PicksLeidos currently has a Zacks Rank #3 (Hold). A better-ranked stock in the same space is Huntington Ingalls Industries, Inc. HII, sporting a Zacks Rank #1 (Strong Buy). HEICO Corporation HEI and AeroVironment, Inc. AVAV are a couple of other well-placed stocks in the aerospace and defense equipment industry. While HEICO Corporation sports a Zacks Rank #1, AeroVironment carries a Zacks Rank #2 (Buy).Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report AEROVIRONMENT (AVAV): Free Stock Analysis Report HEICO CORP (HEI): Free Stock Analysis Report HUNTINGTON INGL (HII): Free Stock Analysis Report LEIDOS HOLDINGS (LDOS): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research