It would be helpful if we knew the size of the tree, how much of the tree was removed, and the health of the tree.  The branches he removed will not grow back. If he removed only the lower row of branches, the tree should be okay.  If he removed a substantial number of the branches, you will need to make sure that the tree isn't stressed by providing adequate water.  Mulch under the tree will help retain the moisture.

Thank you so much for your reply!

The tree is approximately 25-30 feet tall, and approximately 6 feet of the lower branches were removed. The tree was in good health before this pruning.

I have attached several pictures so that you can get a better sense of the situation.

Would adding fertilizer or worm compost to the surrounding soil help the tree?

Thank you again for your expert advice and assistance!

Attached are two documents on pruning trees.  Some of the cuts in the third picture look like they should be touched up.  The tree should be fine since it is mature and should be able to withstand the pruning without damage.  

http://www.cmg.colostate.edu/Gardennotes/612.pdf
http://www.cmg.colostate.edu/Gardennotes/617.pdf

Thank you!

You are welcome!