The Government Accountability Office has thrown out a protest challenging a sole-source extension of guard services at the Centers for Disease Control and Prevention, ruling in Metro East Joint Venture, LLC, B-424392 that the protester waited too long because the clock started ticking the day the agency posted its justification on SAM.gov, not the day it later exercised an option.

In its decision, dated April 21, 2026, GAO dismissed the protest as untimely rather than reaching the merits of Metro East's arguments. The case turned entirely on timing, and it delivers a pointed reminder that a sole-source justification posted to SAM.gov is itself the event that triggers the bid-protest timeliness clock.

The Procurement and the Protest

At issue was a sole-source contract extension for security guard services at the CDC's campuses in Atlanta and Fort Collins. The incumbent set to benefit from the extension was Chenega Global Protection LLC. CDC opted to continue that arrangement without competition, and Metro East Joint Venture, LLC, challenged the decision.

Metro East raised three grounds. First, it argued the sole-source extension violated applicable law and regulation. Second, it contended CDC had failed to address conflicts of interest. Third, it claimed the agency unreasonably delayed implementing corrective action it had previously promised in connection with an earlier round of the dispute.

None of those arguments got a hearing on their substance. GAO never reached whether the sole-source award was justified, whether conflicts went unaddressed, or whether CDC dragged its feet on corrective action. The protest failed on the threshold question of timeliness, and that question came down to which event started the protest clock.

Why the SAM.gov Posting Started the Clock

Under GAO's bid-protest rules, a protest of other than an apparent solicitation impropriety generally must be filed within 10 days after the protester knew or should have known the basis for its challenge. The dispute in Metro East was over when that 10-day window opened.

CDC posted its sole-source notice on SAM.gov on January 27, 2026, with the justification attached. The posted notice, according to GAO, expressly provided that performance could extend to June 30, at least. That posting laid out both the agency's decision to proceed on a sole-source basis and the period of performance Metro East now sought to challenge.

CDC exercised the initial option period on March 25, 2026. Metro East filed its protest on April 6, 2026, which was within 10 days of the option exercise but more than two months after the January 27 SAM.gov posting. Metro East's theory was that the option exercise was the operative event, and that its early-April filing was therefore timely.

GAO disagreed. It held that Metro East's 10-day protest clock began when CDC posted the sole-source notice and justification on January 27, not when the agency exercised the option on March 25. Because the posting already disclosed the sole-source basis and the potential performance period extending to June 30, Metro East had everything it needed to protest in late January. Measured from that date, the April 6 filing was over two months late.

Metro East pushed back with a familiar argument: that protesting in January would have been premature, since the agency had not yet committed to extending performance by exercising the option. GAO rejected the premise. GAO reasoned that a contractor cannot sit on its rights and wait until the agency actually pulls the trigger on the option before filing. The information disclosed in the SAM.gov justification, GAO concluded, was enough to require action then, and the possibility that the agency might not follow through did not excuse the delay.

What It Means for Contractors

The practical lesson is direct, and practitioners have wasted no time underscoring it. A SAM.gov sole-source justification posting is the starting gun for the protest-timeliness clock. As Pillsbury's Bid Protest Debrief, published April 28, 2026, put it, contractors should treat the SAM.gov sole-source notice as the triggering event and not assume that a later protest, filed after the agency exercises an option, will still be considered timely.

For contractors who monitor sole-source actions, the decision reinforces the value of watching SAM.gov closely and reading the attached justifications the moment they post. The justification document is not a courtesy notice that can be set aside until the agency takes its next visible step. It is the disclosure that starts the 10-day clock running, and it frequently contains the very details, including the planned period of performance, that a would-be protester would rely on to build its case.

The decision also cuts against a tempting wait-and-see strategy. A contractor watching a sole-source extension might reasonably prefer to hold off, hoping the agency reconsiders, conducts a competition, or declines to exercise an option, and to protest only if and when the unwanted award actually firms up. Metro East shows the hazard in that approach. If the posted justification discloses the sole-source basis and the performance period, GAO expects a protest within 10 days, regardless of whether later option exercises are still pending. Waiting for the option shoe to drop can forfeit the right to protest at all.

The conflicts-of-interest and corrective-action arguments Metro East raised are a further cautionary note. Even potentially meritorious grounds, including allegations that an agency ignored conflicts or stalled on a promised corrective action, are worthless if the protest is filed too late. Timeliness is a gating requirement, and a strong substantive case cannot rescue a protest that misses the window. For Metro East, the merits of all three grounds remain formally untested, and as a practical matter they are unlikely to be revisited now that the extension is in place.

The takeaway for the federal contracting community is to calendar protest deadlines from the date a sole-source justification appears on SAM.gov, not from the date of any subsequent contractual action. When a sole-source notice posts with a justification that lays out the basis and the period of performance, the prudent move is to evaluate the grounds immediately and, if a protest is warranted, file within 10 days. As Metro East Joint Venture learned, the cost of treating a later option exercise as the trigger is dismissal without ever being heard on the merits.

Sources

GAO Decision: Metro East Joint Venture, LLC, B-424392 (April 21, 2026)
Pillsbury Bid Protest Debrief via JD Supra (April 28, 2026)