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