DOE/NNSA Clearance Action Tracking System (CATS) Development & Maintenance Support Services.

Amendment #10 is issued to revise DOE-L-2015

Offer Acceptance Period (OCT 2015) from: “The

offeror's proposal shall be valid through

September 8, 2026, which is 365 calendar days

after the required due date for proposals.”

To: “The offeror's proposal shall be valid

through January 6, 2027, which is 485 calendar

days after the required due date for

proposals.”

All offerors desiring to extend their proposals

are hereby requested to sign Amendment 10 and

return the signed amendment via email to

tamra.ortiz@nnsa.doe.gov and

Samantha.sartori@nnsa.doe.gov no later than

0800 August 25, 2026. By signing and returning

Amendment 10, Offerors agree to extend their

offers through January 6, 2027. Failure to

sign and return Amendment 10 will result in an

Offeror’s proposal being removed from further

consideration under this procurement.

At this time the Government is not inviting nor

accepting proposal revisions. An Offeror’s

submission of a revised proposal will result in

the Offeror’s proposal being removed from

further consideration under this procurement.

Period of Performance: 03/09/2026 to

03/08/2031