Following a competitive pitch, Four is believed to be advising the body on strategy as well as its yet to be confirmed in-house comms.
Leading the account is MD of public affairs Jeremy Fraser, who reports directly to CEHR chief executive Nicola Brewer. Four will advise the CEHR at least until its official launch.
CEHR aims to benefit the most vulnerable and least-represented people in society. It will promote human rights awareness and encourage good practice by public authorities and business in meeting Human Rights Act obligations.
The CEHR will bring together the work of the Commission for Racial Equality (CRE), Disability Rights Commission and Equal Opportunities Commission.
The amalgamation of the bodies has prompted concern that it will have diluted powers. The CRE previously rejected the proposal, claiming it was a bad deal for the management of race issues.