The CCTF's Working Groups are listed below in alphabetical order of their abbreviation. Some of the Working Groups have restricted-access websites containing their working documents. Where access is restricted to working group members, a username and password are required.

		CCTF Working Group on Time Scale Algorithms (WG-ALGO)
		CCTF Working Group on Coordination of the Development of Advanced Time and Frequency Transfer Techniques (WGATFT)
		CCL-CCTF Frequency Standards Working Group (WGFS)
		CCTF Working Group on GNSS Time Transfer (WGGNSS)
		CCTF Working Group on the CIPM MRA (WGMRA)
		CCTF Working Group on Primary and Secondary Frequency Standards (WGPSFS)
		CCTF Working Group on Strategic Planning (WGSP)
		CCTF Working Group on TAI (WGTAI)
		CCTF Working Group on Two-Way Satellite Time and Frequency Transfer (WGTWSTFT)