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Grant Schweisthal is an account executive in Marsh Agency’s Property & Casualty division. He manages client accounts and helps grow the surety book, drawing on seven years of industry experience and a strong background on both the agency and carrier sides of the business.
Before joining Marsh Agency, Grant held surety underwriting roles at Liberty Mutual and JM Wilson Corporation, where he steadily increased his team’s premium numbers year after year. He believes success in the industry comes from strong execution, careful due diligence, and making every interaction count.
“My personal goal is to be the best asset that I can be for the surety team,” Grant says. “I want to help manage and grow our book while gaining even greater knowledge in surety.”
Grant has been complimented on building strong relationships with clients and coworkers, and he takes pride in double-checking his work for accuracy before submitting anything. He believes that even one poor client experience can have lasting effects, which is why he focuses on responsiveness, precision, and client advocacy.
Grant grew up in Aurora, IL, and enjoys basketball, pickleball, running, lifting, and hiking. He is also interested in economics, history, personal finance, and movies, and he volunteers at his local church. When he is not in the office, you can typically find him spending time with his dog, Riley, an Akita.
Fact File:
Education
- Indiana Wesleyan University (Marion, IN): Bachelor of Arts in Business Administration and Economics
- Four-year scholar athlete, competing in track and field
Professional Designations & Licensing
- Associate in Fidelity and Surety Bonding (AFSB)
Professional Background
- The Horton Group, a Marsh Agency LLC Company
- Account Executive (September 2026 – Present)
- Liberty Mutual
- Surety Underwriter (July 2025 – July 2026)
- JM Wilson Corporation
- Surety Underwriter (May 2022 – June 2025)
- Assistant Surety Underwriter (September 2019 – April 2022)


