"security consultant" sometimes employed by big firms or insurance co's they wonder around with a clip board,
xyz alarm with xyz signaling method (tick)
xyz safe with xyz cash rating (tick)
I doubt there's much demand for a "mission impossible" mock raid on the high street jewellers ?
Assuming you got the jeweller & its security suppliers to allow you to be dangled on the 30ft wire from the hole in the roof, hack the security cameras & open the vault..... someone will remember that the Sheffield branch or whatever got turned over by a driving teleporter though the shop front which set all the alarms off but did not stop 200k of Rolex's vanishing into the night with the only lead being CCTV showing 3 hooded men leaving in a stolen audi
If you feel there's a market for "pen tester" as you describer set yourself up as one,