John Sitilides of the St. George Church in Bethesda, M.D., was invested as Archon in 2017 and conferred with the offikion Referendarios. He helped draft the 1997 Congressional legislation (P.L. 105-51) that authorized President Clinton to award the Congressional Gold Medal to Ecumenical Patriarch Bartholomew.

Archon Sitilides is a Leadership 100 member, where he has served on the Board and chaired the Grants Committee. He has also been a member of the IOCC Board of Directors.

Archon Sitilides is a consultant in Washington, DC, focusing on government regulations, strategic communications and geopolitical risk analysis. He also follows closely and advises on matters related to the US State Department.