Mike Hammes, Founder & CEO
Mike brings nearly 25 years of global legal and leadership experience, having served as General Counsel and Corporate Secretary for a diverse range of businesses across multiple industries. Known for his sharp business acumen and collaborative approach, Mike is a trusted advisor to executive teams and boards on matters of governance, strategy, operations, and risk.
Early in his career, Mike identified a pattern: clients were facing the same legal issues repeatedly. That realization shaped his proactive approach to legal counsel—focusing on prevention, efficiency, and long-term value. He began as outside General Counsel in private practice, before spending nearly two decades in senior leadership roles at Caterpillar Inc. and Eastman Chemical Company.
Over the years, Mike has developed broad legal expertise across sectors including manufacturing, technology, energy, chemicals, defense, and transportation. He has negotiated multi-billion-dollar transactions and driven millions in cost savings through legal process optimization.
Mike’s ability to navigate complex challenges, align legal strategy with business goals, and deliver practical, high-impact solutions makes him a valuable partner to leadership teams navigating today’s increasingly complex global business landscape.
PROFESSIONAL EXPERIENCE
Eastman Chemical Company – Vice President, Legal & Corporate Secretary
Caterpillar Inc. – Assistant General Counsel
Wingert Grebing – Corporate and Business Counsel
Gozdecki & Del Guidice – Corporate & Business Counsel
EDUCATION
University of Notre Dame – Mendoza College of Business
B.B.A., Corporate Finance
Loyola University Chicago – School of Law
J.D., Securities Law Focus
Stanford University – Caterpillar Executive Leadership Program
Executive Leadership Development
University of Pennsylvania – The Wharton School
Artificial Intelligence for Business
LICENSES & PROFESSIONAL ASSOCIATIONS
State Bar Admissions
North Carolina
California
Illinois
Federal Court Admissions
United States District Court for the Northern District of Illinois
United States District Court for the Southern District of California
United States District Court for the Central District of California
Professional Memberships
North Carolina Bar Association - Corporate Counsel Section (Council Member)
Association of Corporate Counsel
VOLUNTEER ASSOCIATIONS
Girls Junior Carolina Hurricanes, Hockey Coach
Interfaith Food Shuttle, Volunteer
Habitat for Humanity, Volunteer
United Way Committee, Member
HIV/AIDS Orphanage – Det Udom, Thailand, Volunteer & Ambassador
Latin School of Chicago, High School Hockey Coach
Contact Longleaf
info@longleafadvisors.com
919.480.2030
Longleaf Advisors
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