Ship Saver
A specialist dedicated entirely to saving the ship. I would be on a team with Seven of Nine, and we'd exchange trade secrets with Lt Barclay in our pathfinder transmissions. We'd submit articles to Ship Saver magazine and have spirited debates with Data and Wesley Crusher on the most efficient route through the Jeffries tubes and the best subsystem for venting excess energy into space.
When the ship isn't in danger, I'd spend my time studying signs of virulent mind-affecting diseases and disciplining my mind to be able to be the last person affected by them. I'd set up a system to have one or two people just happen to be out on a shuttle at all times just in case, and have an emergency system which sends out any logs to this shuttle on a regular interval, and set up a system by which if the crew becomes incapacitated, full control of the ship is transferred to this shuttle upon its return.