My son is Ben Sidwell who is an E-6 and is assistant to the Chief Engineer. Zack would be in his department. He was also given responsibility for Training and I don't know what that entails. I am unfamiliar with the sub organizational or command structure. My son knows Zack and I told him that we were corresponding via this forum.
My son went thru the nuclear power training and then spent 2 years on the teaching staff at Bolliston Spa, NY. At the end of 2 years he was given orders for the Abraham Lincoln but he didn't want to be on a carrier, so he volunteered for the submarine service. Given his height, weight, and size 15 shoe, I thought he was quite courageous to go the submarine route.
I will tell Ben that we are corresponding. They have been thru a trying experience that they will remember for the rest of their lives.
The crew will recieve counseling in the next few days and as I told my son, "time is the best healer of all".
Best wishses to you and your family as well as all the crew and their families.
Thank you to you and your son for his service to our country.