This Request for Proposal (RFP) is for Psychological Testing Services to be performed to support the mission of the United States Capitol Police (USCP), Office of Background Investigations and Credentialing (OBIC). The Contractor shall perform services in accordance with the Statement of Work (SOW). The Government intends to award a Firm-Fixed Price Contract. The resultant Contract will have a base period, which will be effective upon contract execution and shall be effective for one (1) year followed by four (4) one-year option periods.The proposed contract action is for Psychological Testing Services in accordance with the SOW. The NAICS code is 621330 - Offices of Mental Health Practitioners (except Physicians). UPDATE: Due to issues encountered with posting the amendment for the Psychological Testing Services Request for Proposal (RFP) on Sam.gov, the due date for both the USCP response to questions AND the submission of proposals is hereby extended. The USCP response to questions will be posted on Sam.gov no later than Monday, March 20, 2023.The due date for submission of proposals is hereby extended from Wednesday, March 8, 2023 at 3:00 PM to Wednesday, March 29, 2023 at 3:00 PM. Offerors who submitted proposals by the original due date of March 8, 2023 have the option to update and resubmit their proposals by the revised due date of March 29, 2023, if they so choose.All future information about this solicitation, including amendments, will be distributed solely through this website. Interested parties are responsible for monitoring this website to ensure they have the most current information about this