Two companies are fighting over who builds the new Postal Service Health Benefit System

Maximus is locked in a protest fight after the U.S. Postal Service chose Deloitte Consulting for a $175 million contract to the consulting firm to build a new health benefits system.

By 2025, USPS plans to move that new system for delivering health insurance benefits to its employees. USPS tasked Deloitte Consulting to build the system that would include enrollment processing, eligibility determinations, data analytics and other features, according to solicitation documents on GovTribe.

Maximus filed a protest with the Government Accountability Office on Tuesday to challenge the award. The Office of Personnel Management is managing the contract on behalf of the Postal Service.