Rees Scientific Corporation

Rees Scientific Corporation, doing business as Rees Scientific Corp, manufactures and services environmental monitoring systems—temperature, humidity, pressure, and alarm sensors for laboratory, medical, and research facilities—and operates as a prime contractor across federal agencies with no sub-award activity. The company competes full-and-open without set-aside designations and has been registered in SAM.gov since 2002, headquartered in Trenton, New Jersey.

Rees Scientific's federal footprint centers on proprietary environmental monitoring and calibration services delivered to defense medical facilities, health agencies, and federal research institutions. Concrete work spans maintenance and validation services for Rees Centron and Presidio temperature monitoring systems at military hospitals and NIH research centers; installation of wireless monitoring nodes and sensor equipment upgrades; and annual calibration and preventive maintenance under firm fixed-price structures. Representative recent awards include a $2.018 billion option-year delivery order from the NIH Clinical Center for environmental monitoring services (June 2023), a $1.438 billion delivery order from the Defense Health Agency for maintenance services at Portsmouth, Virginia (August 2022), a $878 million sole-source award for installation and validation of an automated centralized environmental monitoring system at Marine Corps Base Camp Pendleton and branch clinics (September 2023), a $829 thousand award from the Defense Health Agency for maintenance services at Camp Zama and Yokosuka in Japan (August 2024), and a $689 thousand award for refrigeration monitoring maintenance and repair at Tripler Army Medical Center in Hawaii (May 2024). Rees Scientific also holds a single-award $10 million Blanket Purchase Agreement with the Department of Health and Human Services covering laboratory supplies, medical and scientific equipment, repair and maintenance services, and miscellaneous services, which enables streamlined procurement across NIH and HHS component agencies.

Customer concentration is driven by defense and health research missions. The Defense Health Agency anchors the largest dollar share at $29.5 million (combined potential value across 137 awards), followed by the Bureau of Medicine and Surgery at $19.3 million (283 awards, the highest volume), the Army Medical Command at $7.4 million (162 awards), the NIH Clinical Center at $6.6 million (66 awards), and NIAID at $4.1 million (87 awards). Together, these five agencies account for 48 percent of combined potential value and 46 percent of recent award count. The vendor serves 88 distinct agencies, reflecting widespread adoption of its proprietary systems across federal medical and research infrastructure; however, concentration in the Defense Health System is pronounced—the top five customers represent nearly half of all dollars.

Rees Scientific places work under the GSA Multiple Award Schedule (191 task orders, $20.2 million combined value), single-award and multi-award BPAs with HHS and NIH agencies, and indefinite delivery contracts. The company holds no GWAC or other government-wide vehicle positions; its footprint is anchored to agency-specific IDCs and BPAs, particularly with NIH Clinical Center ($745 thousand previously cited in award detail) and the HHS $10 million BPA established August 2024.

Recent activity is flat to declining. Annual awards peaked at 62 in 2023 and 59 in 2022, falling to 45 in 2024 and 43 in 2025, with only 18 awards visible in the truncated 2026 data to date. Fifty-one awards (combined potential value $9.9 million) reach ultimate completion within the next twenty-four months, representing moderate recompete exposure. The vendor operates as a pure prime (100 percent prime awards, no sub activity), builds and deploys its own service teams, and does not rely on subcontractors.

Rees Scientific's capability framing centers on proprietary, sole-source environmental monitoring equipment and services. Nearly all federal awards are sole-source procurements justified by the vendor's status as original equipment manufacturer and exclusive owner of Centron/Presidio software, NIST-traceable calibration expertise, Department of Defense cybersecurity compliance, and the proprietary nature of system maintenance that voids warranties if performed by third parties. NAICS concentration reflects instrument manufacturing (460 awards under 811210, Other Electronic and Precision Equipment Repair and Maintenance) and measurement/control device manufacturing. On GSA Schedule, the vendor offers three labor categories—Field Technician ($163.87/hr), Regional Service Manager and Field Engineer (both $191.18/hr)—with no security clearance requirements and education ranging from technical certification to bachelor's degree.

SCI data captures minimal activity: zero invoiced revenue reported in prime records (FY2024), with only 0.2 FTEs recorded across fiscal years 2022 and 2024 (reflecting two prime and three sub records in the SCI dataset). This sparse SCI footprint does not reflect the vendor's broader federal services activity—SCI reporting covers only service contracts above the $150,000 threshold and excludes goods, products, and micro-purchases, which dominate Rees Scientific's actual transaction mix of purchase orders and delivery orders for equipment, sensors, maintenance labor, and calibration services.

Computerized environmental and card access systems