The US Army Dental Directorate has awarded a $30m follow-on contract to Harris to continue providing IT systems and support services.
The company will provide requirements analysis, software programming and development, system interface support, testing, deployment, operations and maintenance, training, and programme management services to dental clinics that serve the US armed forces.
The one-year contract, which offers three one-year options, was awarded during the fourth quarter of Harris' fiscal 2016.
Harris Critical Networks president Carl D'Alessandro said: "The contract demonstrates our ongoing success as an enterprise-wide solutions provider for military health IT services.
"Harris will continue to support the Army Dental Directorate in its critical mission to maintain the health and readiness of our nation's military personnel and their dependents both at home and abroad."
The contract also requires the company to support more than 25 software modules and work on new solutions, such as advanced image processing technology that compares dental images.
Harris has supported the Army Dental Directorate programme on a variety of contracts since 2008.
In May, Harris secured a $96m contract to supply precision approach radars to the US armed forces.