Absolutely! A qualified personal trainer can show a wide range of exercises to put into rotation in your exercise regiment to create muscle confusion and help sculpt your abdominals more thoroughly and quickly.
Get qualified through a internationally recognised institution, and then stay qualified by constantly doing new courses and cec's. Most importantly get a mentor and get experience both in the field...
They are great "objective observers" and can help you figure out what you need and what exercises/diet will be best to get there... provided that the trainer is any good.
They can help with the rehabilitation exercise which can help with the recovery process and also help them with maintaining the exercise while they are also at home.