***THIS IS A COMBINED SOURCES SOUGHT NOTICE AND NOTICE OF INTENT TO SOLE SOURCE*** The National Institute of Standards and Technology (NIST) is seeking information from sources that may be capable of providing database software to support NIST Radioactive Materials Safety Programs. If no alternate sources are identified, the Government intends to issue a Sole Source Award to On Site Systems Inc. 8780 Big Bend Blvd, Ste D, Saint Louis, MO 63119, Unique Entity ID (UEI) STLMHDJNX5C7, under the authority of FAR 12.102(a). The North American Industry Classification System (NAICS) code for this acquisition is 513210. The National Institute of Standards and Technology (NIST) Radiation Safety Division (RSD) currently relies on an obsolete Microsoft Access-based database to manage staff dosimetry records and radiation worker training status. To ensure operational continuity, regulatory compliance, and data integrity, RSD requires a modernized software solution to replace this legacy system. Furthermore, this new software must be fully integrated with RSIMS, a newer in-house database that currently manages all other aspects of NIST's radiation safety program. The purpose of this acquisition is to provide the Environmental Health & Safety Assistant (EHSA) platform, specifically the Radiation Safety Assistant module. This web-based platform will serve as the primary tool to manage dosimetry records and training for radiation workers at NIST. The acquisition of the Environmental Health & Safety Assistant (EHSA) Radiation Safety Assistant module must be procured on a sole-source basis from On Site Systems, Inc., the sole developer and proprietary owner of the platform. Procuring this specific software module from this vendor is the only viable path forward for the Government due to mandatory system integration requirements. The new dosimetry and training software must be fully integrated with RSIMS, a newer in-house database that currently manages all other aspects of NIST's radiation safety program. On Site Systems possesses the exclusive proprietary rights and underlying database architecture (MySQL) knowledge required to successfully configure the EHSA module to speak directly to the RSIMS database without corrupting existing data streams. Functional Requirements: From an IT and Health Physics perspective, the solution must meet strict data handling, integration, and security requirements: The software must include modules for training and dosimetry. The contractor shall perform a one-time data conversion to migrate existing dosimetry and training records from the Government's legacy Access database into the new system. The system must utilize an enhanced security privilege system that allows for host-based verification. To ensure data protection, all password traffic must be encrypted when connecting to the server. The contractor shall implement an Authentication Integration (Single Sign-On) system to allow users to securely access the system using their …