Defence Support Group (DSG) workers struck on Thursday of last week at the Ministry of Defence bases at Colchester, Warminster and Bovington.
The action was part of a national campaign by workers in the Unite union for an 8 percent pay rise.
DSG maintains military equipment, and faces privatisation along with its £65 million cash reserves.
Last month saw a national strike alongside PCS union members and three rolling regional strikes. The action has already had an impact on production.
The combine of union reps from different sites was set to meet on Wednesday of this week to discuss their next moves.
Workers at Donnington, Shropshire, voted on Monday for four more strike days and other action including an overtime ban.