A single environmental technician's résumé has cost incumbent Tetra Tech, Inc. its challenge to keep the Environmental Protection Agency's Superfund Technical Assessment and Response Team (START) VII work, leaving Weston Solutions, Inc. in place on a vehicle with a $67.3 million ceiling. In a decision dated September 22, 2026, the Government Accountability Office denied Tetra Tech's protest in part and dismissed it in part. GAO found that EPA reasonably rejected Tetra Tech's proposal as unacceptable because one of its proposed key personnel did not meet the solicitation's minimum qualifications. GAO also held that the same person's approval under Tetra Tech's incumbent contract made no difference.
The ruling gives a clear warning to any incumbent that expects an agency to accept staff it already approved during contract performance. GAO wrote that "Any approval Tetra Tech obtained during the administration of the incumbent contract has no bearing on the question of whether Tetra Tech's proposal met the minimum qualification requirements."
How START VII Went From Award to Corrective Action and Back
The solicitation was Request for Proposals No. 68HE0324R0010. The program provides advisory and assistance services to EPA on-scene coordinators and other federal officials who carry out EPA's duties under the national response system. According to the contract description on HigherGov's record of the award, that support covers removal support, technical assistance and training, site assessment, remedial support and emergency response. The record says the work also extends to EPA's Superfund pre-remedial and brownfields programs.
EPA first awarded the contract to Weston on November 13, 2025. Tetra Tech, the incumbent, protested. EPA then took corrective action, and GAO dismissed that first protest on December 19, 2025. The decision sets a revised-proposal deadline of March 13, 2026, with final revised proposals due May 6, 2026.
The second evaluation produced the same winner. GAO's decision states: "On June 11, the EPA reaffirmed the award to Weston and notified Tetra Tech." Tetra Tech filed the current protest after a debriefing on June 18, 2026. Weston, of West Chester, Pennsylvania, intervened.
HigherGov's record lists the indefinite-delivery contract as 68HE0326D0001. It was awarded by EPA Region 3 in Philadelphia under full and open competition, with two bids received and no set-aside. The ceiling is $67,333,101, and about $4.9 million had been obligated as of the record's latest update. The period of performance began November 12, 2025, and the ordering period now runs to March 22, 2031 after an extension from June 30, 2030. The record also notes that a stop-work order was issued on the contract in September 2026.
Why One of Eight Environmental Technicians Sank Tetra Tech's Proposal
The RFP required each offeror to propose eight qualified environmental technicians as key personnel. Each technician had to qualify in one of three ways, according to the decision: a bachelor's or master's degree in environmental science or a related field with no experience required; an associate's degree in a related field plus at least two years of direct experience; or no degree and at least five years of experience.
Tetra Tech's eighth technician held a bachelor of arts degree and had about two months of relevant experience. That fell well short of the experience threshold that applies when a candidate lacks a qualifying science degree. EPA assessed a deficiency under the key personnel factor and rated the proposal unacceptable, and GAO upheld that result.
The decision restates a settled rule: where a solicitation requires proposed key personnel to meet specified qualifications, an agency may reasonably find a proposal unacceptable when it fails to satisfy them.
Does Incumbent Approval Count in a New Competition?
Tetra Tech's main argument relied on its history. The same person had been accepted while Tetra Tech performed the predecessor contract, so the firm argued EPA could not now find the technician unqualified. GAO rejected that argument. It applied its long-standing view that "Each procurement is a separate transaction and an action taken under one procurement is not relevant to the propriety of the action taken under another."
The practical result is that the RFP's stated qualifications control, not decisions made while administering a different contract. An incumbent's existing workforce gives it no exemption from a new solicitation's minimums.
Why GAO Would Not Reach the Past Performance Challenge
Tetra Tech also challenged EPA's past performance evaluation. GAO dismissed the remaining allegations because Tetra Tech was not an interested party to raise them: with its proposal reasonably found unacceptable, even a win on those issues could not have put it in line for award.
This sequence is common in GAO practice. Once a protester's proposal is properly excluded on a pass/fail requirement, its remaining challenges to the comparative evaluation usually fall away.
Holland & Knight LLP represented Tetra Tech. Vinson & Elkins LLP represented intervenor Weston. Nathaniel A. Work represented EPA.
What It Means for Contractors
Incumbents that rebid with their current staff should check every key person's résumé against the new solicitation's minimums, line by line. Satisfactory performance on the old contract is not enough. Requirements often change between contract generations, and an earlier approval during performance carries no weight with GAO.
Firms should treat key personnel minimums as pass/fail gates. In this case, one candidate out of eight made the entire proposal unawardable, and every other strength in the proposal stopped mattering. A short audit of degree type (a bachelor of arts versus a bachelor of science, for example) and documented months of experience could have exposed the gap before submission.
Corrective action also resets the evaluation. Tetra Tech's first protest led EPA to take corrective action and request revised proposals. Those revised proposals were then judged against the same qualification rules, and the earlier protest's success did not carry over.
Finally, unsuccessful offerors should look for acceptability problems in their own proposals before they challenge price or past performance ratings. If an agency has documented a reasonable deficiency, GAO will dismiss the remaining grounds for lack of standing.
