The picture is so DCA! They all look the same. The training school on the ML Airservices site has a whole corridor full of them!
Never was an FSO, but recognise Dave Guerin and Dave Burrage. The R. Rogers in back row might be Bob Rogers who I first met in Mt. Isa, but there is little resemblance to the face I knew.
"Guru" is working hard internationally with drone operators and saw Dave Burrage at DCA club get-together 1st June. If it is the Bob Rogers, I knew, have not seen him since he was a Traffic Manager in SY Approach.