The security staff I knew at DXC were always fed up with the inability to travel to client jobs; not having enough resources and unable to meet the client tenders. I through a lot of potential security work their way and had discussions about just getting a foot in the door, but no. Something about 'too much work and not enough staff' But it was routine low revenue work and not the huge potential that could have opened up if someone had just made some time. Anyway, I never got involved in the politics, I just saw the client go to third-parties instead who later became trusted partners.
I even recall DXC staff being told to do CISA training in their own time; pay for it themselves and to take book a day's holiday for their exam! Madness! DXC has never made it easy to encourage the individual to develop a career there or even to want to stay, once they got there and are absolutely useless when it comes to sales. They have one or two great sales folks (who don't work in sales, but know their clients and know how spot an opportunity) but are held back by endless 'red tape' and approvals that its a wonder anything gets won.
Clearly DXC has made its position clear over SC your salary and position won't move.
Just because DXC don't know how to exploit and grow that portfolio, doesn't mean you can't.