just to echo, you need to make sure

1. he has multiple pairs of shoes and can rotate through them so each pair is less stressed and damaged
2. you have enough padding under the shoes to keep his feet, knees, and hips healthy while running around a Publix and standing on harsh concrete for his entire shift

a lot of shoes with the slip resistant sole will also have steel toes, and definitely avoid those if he doesnt need it because they will be so heavy they will cause other problems. i wear 13s and everyone is shocked at how heavy my steel toe, slip resistant safety boots are

i dont have a great recommendation, to be honest i would consider ditching the slip resistant part for better padding.

ive been wearing Altra shoes (best foam sole ive ever found), so i like those a lot but im not sure if they have something easy to sneak into the dress code and you’ll be out several hundred if you get a couple pairs to rotate through.

another option may be to find a good pair of dress shoes with a repairable welt (like a goodyear welt) and get new more fatigue-friendly soles put on but im not 100% that’s possible