OHD LLLP

OHD LLLP, doing business as Occupational Health Dynamics, manufactures and sells respiratory protection equipment, fit testing systems, calibration services, and occupational health diagnostic devices to federal agencies as a prime contractor (100% of recent awards) under Total Small Business set-asides. The Birmingham, Alabama–based limited liability partnership is a small-business manufacturer specializing in QuantiFit quantitative respirator fit testing systems, AeroFit fit test equipment, audiometers, personal air sampling devices, and associated calibration, maintenance, and inspection services that span 269 federal awards over the past two decades.

OHD LLLP's customer base is highly concentrated in defense and law enforcement occupational health and safety programs. The top five funding agencies account for 41% of awards by count but 68% of combined potential value, led by the Federal Bureau of Investigation Headquarters Division (30 awards, $3.4 million combined potential value), the Air Force Air Mobility Command ($1.3 million), Naval Sea Systems Command (29 awards, $838 thousand), Navy Installations Command (33 awards, $730 thousand), and US Pacific Fleet Forces (5 awards, $256 thousand). The FBI relationship is anchored by a $148,000 blanket purchase agreement for annual calibration and maintenance services running through December 2025, while Naval Sea Systems Command holds a $84,550 BPA with OHD. Recent prime work includes a $1.3 million total small-business purchase order from Air Mobility Command in April 2024 for 61 QuantiFit2 gas mask fit testing systems delivered to 46 domestic and 15 overseas Air Force locations; a $280,500 total small-business award from Naval Sea Systems Command in August 2025 for 12 QuantiFit2 gas mask leak testers and accessories; and a $132,975 multi-year service contract with Navy Installations Command running through July 2030 for full-service calibration and maintenance of 21 QuantiFit instruments across Southwest regional installations.

NAICS concentration runs to respiratory and diagnostic equipment manufacturing — Electromedical and Electrotherapeutic Apparatus Manufacturing (70 awards) and Medical, Dental, and Hospital Equipment Merchant Wholesalers (63 awards) dominate the footprint, with primary PSC codes in Medical and Surgical Instruments (80 awards) and Safety and Rescue Equipment (37 awards). Award volume has remained steady across the past five years (7 to 17 awards annually, 2022–2026), with 269 total awards carrying $9.6 million in combined potential value and $9.2 million obligated (96% execution rate). The recompete cliff is minimal — only two awards totaling $87 thousand face ultimate completion within the next twenty-four months. Nearly all awards are firm fixed-price purchase orders to OHD's Birmingham headquarters or satellite facilities; one subcontract award under General Dynamics Information Technology for global security engineering and supply chain services in July 2026 represents the only sub-award in the source data. OHD has held a continuous federal presence since SAM registration in 2001 and operates as a 100% prime contractor across occupational health and safety procurements where agencies specify its proprietary QuantiFit and AeroFit systems or require its specialized calibration and maintenance expertise.

OHD offers on-going service, support, and calibration on equipment sold. This includes annual calibration for the OHD FitTester 3000, Quantifit, doseBadges, and sound level meters. On-site calibration is available for most brands of audiometers. All parts, accessories, and supplies are available through OHD.

OHD is one of only four Service and Calibration Centers worldwide for the Cirrus Research plc doseBadge Noise Dosimeter and we can offer you a complete range of service, calibration and upgrade options for this unique product. Please contact us for more information. For more information visit our website at https://www.ohdusa.com/services.