Lockheed Martin [LMT] said last Thursday that its United Kingdom subsidiary has acquired a small business that supports that country’s Trident ballistic missile submarine program.

Imes Strategic Support Limited (ISSL), a subsidiary of Britain’s IMES Group, provides engineering, maintenance, repair and support subsystems of the U.K. Royal Navy’s Trident submarine at the Clyde naval base in Scotland. The business unit also provides support to another shipyard as well as the U.K. Software Facility. ISSL recently received a 10-year extension to provide these services with an option for another five-year extension.

Terms of the deal were not disclosed, although Lockheed Martin said it would be immaterial. ISSL has 87 employees.

Lockheed Martin said the acquisition is a “natural strategic fit,” given ISSL’s work on the U.K. Trident submarine program and Lockheed Martin’s status as prime contractor for the United States Navy on the Trident Fleet Ballistic Missile program.

“ISSL will provide an important set of capabilities in the United Kingdom and will enable us to offer a broader set of solutions to our British strategic weapons system customer,” Joanne Maguire, executive vice president of Lockheed Martin’s Space Systems Co., said in a statement.