Mark B. Messmer
RepublicanU.S. Representative, IN-8| Age | 58 (b. 1967-12-16) |
| Gender | Male |
| In office since | 2025-01-03 (~1 yrs) |
| Race / ethnicity | White |
| Religion | Roman Catholic (member of Holy Family Catholic Church, Jasper, Indiana) |
| Education | Graduated Jasper High School (Jasper, IN) 1981; B.S. in Mechanical Engineering, Purdue University, 1985 |
| Prior occupation | Mechanical engineer and business owner; co-owner of Messmer Mechanical, Inc. (HVAC/plumbing/heating company in Jasper, IN) since 1988; earlier worked as a project engineer with John Brown Engineering and Dow Chemical |
| Military service | No |
| Birthplace | Jasper, Indiana |
| Marital status | Married — Kim (Kimberly A.) Messmer |
| Children | 4 |
| Residence | Jasper, Indiana |
| Notable relatives | Co-owns family business Messmer Mechanical with brothers Ed and Roger Messmer; parents Jerry and Linda Messmer founded the company. No relatives in elected office. |
Pending research: languages · openly lgbtq.
Career & politics
| First elected | 2008 |
| Previous offices | Holy Family School Board member (2001-2004), President (2003-2004) · Indiana House of Representatives, District 63 (2008-2014) · Indiana State Senate, District 48 (2014-2024) · Majority Leader, Indiana State Senate (2018-2022) |
| Committees | House Committee on Agriculture · House Committee on Armed Services · House Committee on Education and Workforce |
| Caucuses | Republican Governance Group · Congressional Western Caucus · Republican Main Street Caucus |
| Leadership | Vice Chair, Subcommittee on Workforce Protections (House Education and Workforce Committee), 119th Congress |
| Ideology | Republican; self-described as 'pro-life, pro-gun, and pro-Trump.' Previously affiliated with the moderate Republican Governance Group. |
| Signature legislation | Indiana Senate Bill 388 (2022) - restricting foreign business entities from acquiring Indiana agricultural/cropland and timberland (authored as state senator) · Indiana 2021 wetlands bill (SB 389) - reducing state wetland protections (authored as state senator) |
Financial
Net worth: disclosed $332,000–$715,000 (2024) · estimate
| Indiana Public Retirement System Legislators' Defined Contribution Fund | fund · $250,001–$500,000 · 2024 |
| Indiana Public Employees' Deferred Compensation Plan | fund · $50,001–$100,000 · 2024 |
| Kimberly A. Messmer, Inc. (cosmetics business) | business_owned · $15,001–$50,000 · 2024 |
| Messmer Mechanical, Inc. (HVAC/plumbing family business, co-owned) | business_owned · 2024 |
Scandals & crimes ledger
No recorded incidents. Under the adjudicated-only methodology, an entry appears only when a court or official body has formally acted and the record is cited.