# Montana eMacs #REV-RFP-2027-0044AB

Montana seeks cloud-based CAMA system to replace Orion (AT-Pro)

**Posted:** October 27, 2026
**Respond By:** November 17, 2026
**Identifier:** REV-RFP-2027-0044AB
**NAICS:** 513210, 541511, 541512, 518210

Montana is seeking a cloud-based CAMA solution to replace its existing property appraisal system.
- **Government buyer:** State of Montana, through the State Procurement Services Division (SPSD), on behalf of the Montana Department of Revenue.
- **Requirement:** Replace the current Orion (AT-Pro) Computer-Assisted Mass Appraisal (CAMA) system with a modern, cloud-based solution.
- **Key needs:** Support Montana’s statutory property-tax administration obligations and the Department’s operational needs for more than 10 years.
- **Named system/vendor:** Orion (AT-Pro) is identified as the system being replaced, not as the requested solution provider. The solicitation does not identify its manufacturer.
- **Products, quantities, and part numbers:** No specific product models, part numbers, or quantities are provided. Detailed service requirements are referenced in the RFP questions.

### Description

The State of Montana, State Procurement Services Division, on behalf of the Department of Revenue, is seeking proposals to replace the current Orion (AT-Pro) Computer-Assisted Mass Appraisal (CAMA) system. The replacement is to be a modern, cloud-based CAMA solution that meets Montana’s statutory obligations for property tax administration and supports operational needs for the next 10+ years. The solicitation states that further details about the services are provided in the RFP questions, and responses must follow its instructions and procedures.

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