Harris has secured a $106m contract to continue to support the US Air Force's (USAF) ground-based systems used in missile warning, defence and space surveillance missions.
The contract will see Harris provide depot-level maintenance, repairs and upgrades, contractor and logistics support to ensure the weapon systems are continually available and capable.
Under this follow-on deal, Harris will continue to support ground-based systems that support six weapon systems in 12 locations under the Air Force Life Cycle Management Center's System Engineering and Sustainment Integrator (SENSOR) contract.
Awarded in 2002, SENSOR is a five-year base contract with up to 13 earned option years. This award represents the tenth option year.
The systems being supported alert the US and allies to ballistic missile attacks.
Harris Space and Intelligence Systems president Bill Gattle said: "These systems are critical to helping keep the US and its allies safe.
"We are privileged to be entrusted to sustain these resources that protect our nation and aid our customer's mission."
Earlier this month, Harris was awarded a contract to supply precision approach radars (PAR) to the US armed forces over a period of eight years.
The $96m contract from the US Naval Air Systems Command (NAVAIR) requires the company to supply PAR to the USAF, Navy, and Army.