UNSPSC 81101900: Oil and gas engineering

UNSPSC 81101900 Oil and gas engineering is a Class code that covers architect-engineer and professional consulting services for infrastructure, environmental, and utility projects — not oil and gas sector work as the code name might suggest. State and local governments are soliciting under this code for flood control engineering, landfill services, wastewater treatment facility design, airport planning and materials testing, power generation and green infrastructure, roadway and bikeway design, geotechnical testing, cost estimating, and construction administration across public works, water utilities, and special-district programs. The issuing bodies are primarily county public works and flood control districts (Orange County, California leading activity), supplemented by city planning and airport authorities, state transportation and environmental agencies, and regional water and utility authorities. These are overwhelmingly on-call architect-engineer task order contracts—Request for Qualifications (RFQ) vehicles that establish Qualified Vendor Lists (QVL) for multi-year periods (typically three years) with no guaranteed minimum work volume, individual projects assigned through separate Contract Task Orders (CTOs) with negotiated costs, and compensation structured as time-and-materials on hourly-rate bases by staff classification.

Recent activity centers in California (Orange County dominates with at least ten concurrent RFQs posted in May–July 2026) and Georgia (GDOT and local municipalities), with additional work posted in Florida, New Mexico, Missouri, and New York. Representative solicitations include Orange County Public Works' RFQ for Architect-Engineer Flood Control Engineering Services (0803091002RE, due August 13, 2026) seeking design, hydraulic analysis, and plan-checking services for county-wide and district-wide flood control projects; Orange County's RFQ for Geotechnical & Materials Testing Services (0803026003RE, due May 15, 2026) for geotechnical reporting and construction inspection; the County of Orange's RFQ for Power Generation, Distribution Engineering & Commissioning Services (0803025703REA, due July 3, 2026) for electrical and renewable energy infrastructure; Madison County, Georgia's RFQ for wastewater treatment facility upgrades and sewer-line extension design (PE66141NONST2026000000024, due June 24, 2026); and the Georgia Department of Transportation's RFQ for Construction Engineering Inspection services on the SR 25 Darien River bridge project (PE48401RFQ2026000000546, due April 17, 2026). All RFQs require California or state professional engineering licensure, three to ten years of relevant experience in comparable public-sector work, and typically demand time-and-materials compensation with no price increases during the contract term and prevailing wage compliance where applicable.