IT and army pensions staff at Computer Sciences Corporation (CSC) finished a five-day walkout on Friday of last week.
Most of the 200 PCS union members are based in Glasgow, with others based in Gosport, Hampshire.
They struck after CSC bosses offered them a pay rise of less than 0.5 percent for the last year.
PCS branch chair Harold Good said, “The week has been fantastic. It’s been an incredible atmosphere with so many different members joining us on the picket line each day.
“We’ve had young and older members coming along—everyone wanted to be involved.”
Striking National Gallery workers visited pickets to show support.