After the sheriff evicted the tenant and changed the locks, she hired a locksmith to drill through them so she could move back in.

This eviction is my first time on this route with a note, and am open to suggestions from people who have taken this road before.I've coordinated with a business that will provide a locksmith and will put them in contact with the sheriff in order for the locksmith to meet at the same time.I'm debating on whether to offer $500 to $1,000 through my attorney to the occupant, the former borrower, to remove all furniture and personal belongings and not damage / vandalize the house.I will have people there to move out the furniture to the sidewalk if the occupant leaves the house a mess.I will have people there to secure the property against squatters.I will have an appraiser there to appraise the inside of the house.Finally, I will have buyers there to look inside and make me an offer.   

My question is that do we need to bring a professional locksmith and movers once we get the green light from Constable ?

You may need a locksmith and if there's any concern about safety, have a deputy present.

A local locksmith can do the same, but more expensive.

A local locksmith can do it for you, or I highly recommend Landlord Locks.

Because of the situation (her friend who we talked to when we were there said she was depressed as her husband left her and she has a small kid), we left a note and will be phoning the police tomorrow for a welfare check and then will have a locksmith meet us on Thursday to rekey the lock (giving her notice and telling her when, so we aren't locking her out, but we can't get in). 

Do i just call the locksmith and i tell him the owner gave permission?

You can refer the owner a locksmith to provide you access and to change the locks.

I'd bring a camera, a backup and a locksmith if your state and/or local jurisdiction has no restrictions from you going and changing the locks and starting your clean-out.Regarding the eviction...I've done hundreds of evictions but I've never done one for the benefit of the end buyer.