Cleaning equipment

Hello we clean homes businesses and farms stalls kennels we clean up after horses goats chickens several different cleaning methods depending on the customer we have a unique need when it comes to cleaning equipment not the typical cleaning equipment our main employee is autistic and we want to expand to hire more people on the spectrum of course we would have to vet completely how would you decide if certain employees can or cannot use specialized cleaning equipment? For the most part rakes But we also need a small back hoe that will only be used by specific people in the business would we be in trouble for discrimination? How would we protected