Frey has represented Fairfax County on the Washington Metropolitan Council of Governments' Transportation Planning Board, the Committee on Noise Abatement at National and Dulles Airports (CONAANDA), and is presently the County's representative to the Council of Governments' Development Policy Committee. He has also Chaired the Board of Supervisors' Development Process Committee since 1992, and is regarded by many as one of the most knowledgeable officials in Virginia on land use and development issues. He has been a member of the Executive Committee of the Dulles Area Transportation Association (DATA) since 1992, and currently serves on the Inova Health Care Services Board, the Fairfax Partnership for Youth, Inc, and the Rt. 28 Highway Transportation Improvement District Commission.

Frey has been involved in a variety of community activities. He is a charter member of the Burke Rotary Club. For more than ten years he coached youth basketball and baseball for both the Springfield Youth Club and the Southwest Youth Association. Issues affecting our youth remain one of Frey's top priorities, and he has been a strong supporter of youth athletics.

During his five terms in office Frey has traveled overseas as a representative of local government officials. He was part of official delegations of local and state representatives that visited Israel and Switzerland in 2000 and 2001. In 2004, Frey participated in a pilot program in Cambodia sponsored by the International Republican Institute. He worked with IRI to develop and present a program to several commune councils elected in the first-ever local elections in Cambodian history.

Michael Frey has been a strong voice on the Board of Supervisors since 2005 in support of Fairfax County bidding to host the World Police and Fire Games, and in 2009 traveled with Team Fairfax to Vancouver, British Columbia, where Fairfax County was subsequently awarded the honor of hosting the 2015 games.