The two-year contract has been awarded by the Naval Information Warfare Center (NIWC) Pacific.
It represents new work for the company and has a cumulative value of $17.9m.
MARFORCYBER is a functional formation of the US Marine Corps (USMC) to protect critical infrastructure from cyberattack.
Perspecta said work under the contract will include software development, testing, integration, and maintenance services.
These services will improve the cyber capability of the command and allow it to conduct full-spectrum cyberspace operations.
Perspecta defence group senior vice-president and general manager Jeff Bohling said: “The changing nature of warfare means the Marine Corps has to project a flexible and lethal force across multiple domains.
“With this programme, the Corps will gain the advantage it needs to dominate the modern cyber battlefield.”
The latest task order increases Perspecta’s cyber tool development programmes for the US Department of Defense (DoD) and the Intelligence Community.
Last month, Perspecta’s applied research arm Perspecta Labs secured several contracts to support the full-scale testing and prototyping of dual-use fifth-generation (5G) technology for the US DoD.
In August 2019, Perspecta secured a position on a potential seven-year US Navy cyberspace science, research, engineering and technology integration programme.