Our diversity
only makes
us stronger.

Voted

“the best and most effective”

multi-client lobbying firm by a wide margin.

MIRS Capitol Capsule poll of Lansing insiders

clients

We proudly represent a broad spectrum of blue chip clients, including many leading Fortune 500 companies.

lobbying

Federal, State, and Local.

40+ Years

Through our team of 10 executive professionals, GCSI puts hundreds of years of collective management.

Our Team Has The Expertise You Need

GCSI’s definition of government affairs includes a multi-faceted approach to communicating with all levels of government on a variety of issues. We combine a strategic approach to relationship development, qualified research, aggressive advocacy, and political intuition — all that accrue to the benefit of our clients. Since 1983, GCSI has grown to become a leader in the industry as Michigan’s premier government affairs firm. GCSI is comprised of a diverse group of highly acclaimed professionals with a single-minded focus on client service, including federal, state, and local lobbying, grassroots organization, and procurement.

Our Team Has The Expertise You Need

GCSI’s definition of government affairs includes a multi-faceted approach to communicating with all levels of government on a variety of issues. We combine a strategic approach to relationship development, qualified research, aggressive advocacy, and political intuition — all that accrue to the benefit of our clients. Since 1983, GCSI has grown to become a leader in the industry as Michigan’s premier government affairs firm. GCSI is comprised of a diverse group of highly acclaimed professionals with a single-minded focus on client service, including federal, state, and local lobbying, grassroots organization, and procurement.