This is a sources sought notice for market research to identify sources capable of providing preventative maintenance, diagnostic inspections, and repairs for thirty-nine 400 Hz cycle converters at Tobyhanna Army Depot. The anticipated acquisition strategy is a single-award firm-fixed-price contract covering preventative maintenance and emergency repairs, with the small business set-aside decision to be determined based on responses. Interested parties must submit a capability statement demonstrating experience servicing 400 Hz converters or equivalent industrial power systems, and must be able to meet a mandatory 48-hour on-site emergency response requirement. The relevant NAICS code is 811210, and the government will not compensate for submitted information.