Groomer who can work with a grooming-reactive dog?

My dog is super sweet and friendly at all times in day to day life… but apparently nips at groomers. (He’s a newer rescue, so news to me.) I got trazodone from the vet to help chill him out but need a groomer that is experienced with mildly sedated dogs and grooming reactivity. I’m in the WeHo area but willing to travel a bit if absolutely necessary. Any advice? Trying to avoid DIY’ing this and ending up with him looking crazy.