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

Amendment #6 incorporates revised attachment L-1 and extends the proposal due

date to September 8, 2025 at 0800 Mountain Time.

Amendment #5 revises CLIN 02001 and 03002.

Amendment #4 incorporates the following revised attachments L-1, L-3, L-7 L-8, and

L-11; and revises the cover letter stating questions will no longer be accepted and any

proposal, modification, or revision, that is received after the exact time specified for

receipt of proposals is "late" and will not be considered.

Amendment #3 extends the proposal due date to August 28, 2025; Revises CLINs

00001, 00002, 02001, and 03002 Incorporates the following revised attachments: L-1,

L-2, L-3, L-7, and M-1; Incorporates attachment L-11 Questions and Answers and

Removes attachment L-6 in its entirety.

Amendment #2 extends the questions or concerns submissions from July 23, 2025 to

August 7, 2025 and extends the proposal due date to August 22, 2025. This extension is

due to a system error that did not release the original solicitation in SAM.gov and will

therefore allow prospective offerors with access to SAM.gov the same allotment of

time to review the RFP, submit timely questions, and development of its respective

offer as those that have accessed the RFP through FedConnect.

Amendment #1 uploading attachment M-1 Section M Provisions to the solicitation.

Request for Proposal No. 89233125RNA000262, the U.S. Department of Energy (DOE),

National Nuclear Security Administration (NNSA) Contracting Operations Division is

hereby issuing the attached Request for Proposal (RFP) for the Clearance Action Tracking

System (CATS) Development & Maintenance acquisition.

Clearance Action Tracking System (CATS) Development & Maintenance is being solicited as a

competitive small business set-aside 8(a) in accordance with FAR Part 19 and FAR Part 15, Contracting

by Negotiation. This acquisition has been assigned North American Industry Classification System code

541511 – Custom Computer Programming Services, with a size standard of $34 million.