The U.S. Army Yuma Proving Ground is conducting market research for contractors capable of providing OPG Optical Comparator and OPG Multi Sensor Measuring Machine calibration services at Yuma Proving Ground, Arizona. The work includes bi-annual NIST-traceable calibrations, on-site repair, annual preventative maintenance with parts, labor, and travel, and one emergency on-demand visit per instrument. The applicable NAICS code is 811210 with a $34.0 million small business size standard, and the requirement may be set aside for small businesses or procured through full and open competition. The draft PWS references an anticipated performance period from 21 February 2027 through 20 September 2030. Interested parties are asked to email a capabilities statement of no more than 10 pages to the contract specialist, with no telephone inquiries accepted.