BATH — Bath Iron Works received a $38.9 million modification to a previously awarded contract to perform services associated with the detail design and construction of DDG 1000 Zumwalt-class destroyers, the U.S. Navy said.

The DDG 1000 is the Navy’s next-generation, guided-missile destroyer.

The contract modification will allow BIW to continue to provide services such as engineering, design, production control, accuracy control and information technology. Other work includes program management, contract and financial management, procurement and configuration/data management.

The original contract was awarded in September 2011 and the work is expected to be completed by October 2013.

“With all three Zumwalt-class ships now under construction, this award demonstrates the Navy’s continued confidence in Bath Iron Works. The contract enables us to continue supporting the construction of DDG 1000-class ships and allows us to maintain the critical shipyard skills needed to efficiently produce them,” said Jeff Geiger, president of Bath Iron Works.

Bath Iron Works, a unit of General Dynamics, employs about 5,400 workers.