Hull maintenance technician (abbreviated as HT) is a United States Navy occupational rating.

Hull maintenance technicians plan, supervise, and perform tasks necessary for fabrication, installation and repair of all types of shipboard structures, plumbing, sheet metal fabrication, carpentry and piping systems; organize, supervise, and train personnel in maintenance and hull and mechanical repair; supervise and perform tasks in procurement and issuance of supplies and repair parts; instruct personnel and enforce safety and security precautions; prepare records and reports, and maintain shipboard sewage systems.

This expertise may include metal of all thicknesses with hand tools, welders and very large cutting, forming and shaping equipment.

Treasure Island continued to train new sailors in the art of damage control until the base was decommissioned in 1996.

[5] Here sailors learn drafting, blueprint reading, quality assurance, hand tools, sheet metal work, welding, brazing, pipefitting, cutting, metal identification, piping systems, measurements, shop safety, and shipboard sanitation systems.

[7] Aboard larger ships such as amphibious transport docks, plumbing and sewage-related maintenance can take up the overwhelming majority of a hull technician's workload.