The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support Mechanicsburg, is soliciting proposals for the repair and modification of Hydrogen S cylinders. This procurement aims to ensure that the repaired items meet stringent operational and functional requirements, adhering to various quality assurance standards and specifications. The cylinders are critical components used in naval operations, necessitating compliance with specific cleaning and contamination protocols, particularly regarding mercury. Interested contractors should direct inquiries to Jessica Harpel via email at jessica.l.harpel2.civ@us.navy.mil, with proposals expected to align with the outlined requirements and quality standards. The solicitation emphasizes a total small business set-aside, encouraging participation from eligible small businesses.