Locker codes for DOOM 3: ROE and Lost Mission
Doom 3: ROE
#028 – 516
#029 – 516
#105 – 769
#407 – 937
#408 – 937
#034 – 134
#035 – 134
#042 – 714
#009 – 492
#116 – 634
#117 – 634
Display Case in Sarge’s Office – 428
Security Core Bridge – 281

Doom 3: LM
#054 – 631
#108 – 847
#104 – 579
#965 – 428
#071 – 532
#805 – 372
#806 – 372
Coolant Control Room Display Cabinet – 731

Hope this helps!

Thanks.
But you might want to post these keys in the game's subforum also, where they will probably be more visible to owners of the game in search for help.
https://www.gog.com/forum/doom_series#1724482472

I'll do that! Thanks.