 Cordtz rose within the SEIU international hierarchy as well.He was elected a member of the SEIU Executive Board in 1968, an International Vice President in 1972, and International Secretary-Treasurer in 1980.While he served as SEIU Secretary-Treasurer, Cordtz also was elected secretary-treasurer of the Conference of Secretary-Treasurers of the AFL-CIO, vice-president of the AFL-CIO Transportation Trades Department, a director of the A. Philip Randolph Institute, an international board member of the International Federation of Commercial, Clerical and Technical Employees, and was a member of the Industrial Relations Research Association.