GTM is founded and incorporated in the state of Delaware by Joseph DiBianca.

Philadelphia regional office opens in Broomall, PA.

GTM opens its Pittsburgh, PA office.

GTM forms Employee Stock Ownership Plan (ESOP).

37.5% employee owned

GTM Employee Stock Ownership Plan (ESOP) 100% employee owned.

GTM appoints Dave Laurinaitis as second CEO and Managing Director.

GTM makes its first appearance on the Inc. 5000 list of fastest growing privately held companies in the U.S.

GTM celebrates its 20th anniversary!

GTM celebrates 10 years as an ESOP company!

GTM opens DC Metro office in Tysons, VA.

GTM joins WTS Global international tax network.

GTM Joins Thomson Reuters ONESOURCE Certified Implementer Program (CIP) as First Firm in Silver Tier.

Accounting Today names Global Tax Management One of 2018 Best Firms to Work For.

GTM officially launches Transfer Pricing practice.

GTM launches Property Tax practice.

GTM Appoints its First Chief Technology & Information Officer (CTIO).

GTM Named Among Best Firms for Young Accountants.

GTM celebrates its 25th anniversary!

GTM launches R&D Tax Credit practice.

GTM expands NY Metro presence with the opening of a NYC office.

Dave Sekula appointed as third CEO in firm history.

GTM earns a spot on the 2021-2022 Inc. 5000 list of fastest growing privately held companies in the US.

GTM opens offices in North Carolina and Ohio.

GTM Training Institute launches its first virtual training program focused on ASC 740 tax provision and income tax compliance.

GTM debuts on INSIDE Public Accounting’s Top 100 Firms in the nation rankings.

GTM named among Top Tax Firms by Accounting Today.

GTM introduces GTM Engage, providing professional services firms with access to tax services for their clients. 

GTM named among 2023 Best Firms for Technology by Accounting Today.