Jamar, a member of the Business Litigation and Government Contracts practice groups, is a seasoned litigator with significant state and federal trial experience who focuses his practice on solving problems for clients operating in the complex realm of government procurement. He provides counseling and litigation support to clients on everything from regulatory compliance to dispute resolution to responding to government investigations.
In addition to advising government contractors, Jamar has handled complex commercial litigation, general contract disputes, business fraud lawsuits, government enforcement actions, and domestic public corruption investigations. His clients range from individuals and small businesses to some of the largest companies on the Fortune 500 list. In particular, Jamar has significant experience representing marketing and media agencies against claims from their former clients and competitors. In every instance, whether resolved through settlement, motion practice, or at trial, Jamar has effectively defended clients’ interests and helped them achieve their goals.

Focus Areas
- Litigated environmental enforcement action brought by Ohio Environmental Protection Agency against defense and aerospace manufacturer, resulting in favorable agreed resolution.
- Represented government contractor in contract dispute against the General Services Administration before the Civilian Board of Contract Appeals.
- Negotiated favorable resolution of pre-litigation dispute between defense contractor and consultant arising from CMMC readiness consulting agreement.
- Counseled chief financial officer of defense contractor involved in false claims act investigation, resulting in no action taken against client.
- Routinely manage responses to requests for information, including civil subpoenas, grand jury subpoenas, and civil investigative demands, issued to individuals, government contractors, and other entities.
- Successfully defended Fortune 500 manufacturing company in commercial contract dispute tried to jury verdict.
- Obtained complete dismissal of lawsuit alleging investment fraud claims against private equity firm.
- Successfully defended media buying agency against claims of improper retention of incentives and rebates.
- Obtained complete dismissal of claims in music royalty dispute against digital performance royalty distribution company.
- Represented Fortune 500 energy company in litigation that thwarted local municipality’s attempt to violate Ohio Certified Territories Act.
- Represented elected official investigated for public corruption in connection to Hobbs Act violations. Prosecution declined.
- Represented lobbyist in two-year federal public corruption investigation. Prosecution declined.
- Represented private equity firm in federal securities investigation. Prosecution declined.
- “Best Practices for Navigating Contract Disruptions Under the New Administration,” Thompson Hine Transition – A Presidential Change Update, February 2025
- “Loper Bright’s Impact on Government Contract Litigation,” Thompson Hine Government Contracts Update, July 2024
- “New Ordinance Impacts Real Estate Around Wright-Patterson Air Force Base,” Thompson Hine Real Estate Update, October 2023
- Profiled in University of Toledo College of Law Alumni eNews, December 2022
- Co-author, “Remote Employees With 2 Jobs Pose New Risks to Cos.,” Law360, April 2022
- Co-author, “Mitigating risks in prescribing and dispensing chloroquine and hydroxychloroquine for COVID-19,” Compliance Today, June 2020
- “Federal, state authorities step up efforts to prevent hoarding of chloroquine, hydroxychloroquine,” Medcity News, April 16, 2020
- “DOJ and HHS Launch a National Nursing Home Enforcement Initiative,” Thompson Hine Health Care Update, March 2020
- “The Art of Argument: Using the Pixar Storytelling Formula to Persuade Judges and Jurors,” Litigation Management in a New York Minute Seminar, Network of Trial Law Firms, August 3, 2018
- “Navigating Cincinnati’s Thriving Startup Ecosystem,” Thompson Hine “Startups Streamlined” seminar series, July 2024
- “Navigating Litigation and Investigations for Government Contractors,” Thompson Hine “Government Contracting Perspectives” workshop series, Session 2, University of Dayton School of Law, June 18, 2024
- “Considerations When Forming Your Business and Entering the Government Procurement Market,” Thompson Hine “Government Contracting Perspectives” workshop series, Session 1, University of Dayton School of Law, April 9, 2024
- “Gov Con Law 101 for Companies That Aren’t Government Contractors,” Dayton Bar Association – Corporate Counsel Section, November 30, 2023
- “Protecting Your Business from Common Government Contracting Pitfalls,” Thompson Hine “Tackle Tomorrow Today” webinar series, October 25, 2023
- “Hot Topics in Health Care Privacy Law,” Thompson Hine “Tackle Tomorrow Today” webinar series, September 26, 2023
- Government Contractor Briefing, November 15, 2022
- “Get Paid: Collecting Payment on Government Construction Projects,” Dayton Human Relations Council, Subcontractor Meeting, June 29, 2021
- “Product Pricing Pitfalls During a Pandemic: From Sweepstakes and Contests to Discounting, Price Discrimination and Price Gouging,” Thompson Hine Webinar, June 16, 2020
- Included in the 2021 to 2025 editions of Best Lawyers: Ones to Watch® in America for Commercial Litigation and Criminal Defense: White-Collar
- Named to Lawyers of Color’s Hot List 2020
- Dayton Bar Association’s Bar Briefs Rising Star of the Month, December 2020
- Recipient, Joseph Cinque Award, Black Law Students Association, University of Dayton School of Law, 2019
- Recipient, Thompson Hine Diversity Champion Award, 2019
Professional Associations
- Leadership Council on Legal Diversity (LCLD), Fellow, 2024
- Dayton Bar Association, Board of Trustees Treasurer, 2022-2024
- Federal Court Local Rules Committee for the Southern District of Ohio, 2021-present
- Greater Dayton Diversity, Equity, & Inclusion Legal Roundtable, Founding Member, 2018-present
- Dayton Area Mock Interview Program, Founder, 2018-present
- Dayton Area Diversity Summer Clerkship Program, Co-Founder, 2015-present
- Ohio Supreme Court Board on the Unauthorized Practice of Law, Board of Commissioners, 2018-2021
- Ohio State Bar Association Leadership Academy, Class of 2020
- Dayton Bar Association Leadership Development, Class of 2015
Community Involvement
- The Air Force Museum Foundation, Board of Trustees, November 2024-present
- AFCEA, Dayton-Wright Chapter, Emerging Leaders Committee, 2023-present
- Wesley Community Center, Board of Trustees, 2017-2021
- UpDayton, Board Member, 2014-2018
- City of Dayton Neighborhood Leadership Institute, Class of 2017
Education
- University of Toledo College of Law, J.D., 2013, magna cum laude,
Order of the Coif
- Bowling Green State University, B.S.Ed., 2009
Bar Admissions
- Ohio
Court Admissions
- U.S. District Court for the Northern District of Ohio
- U.S. District Court for the Southern District of Ohio
- 06.18.24 – Government Contracting Perspectives – Workshop Series – Session 2
Navigating Litigation and Investigations for Government Contractors
- 04.09.24 – Government Contracting Perspectives – Workshop Series – Session 1
Considerations When Forming Your Business and Entering the Government Procurement Market
- Best Practices for Navigating Contract Disruptions Under the New Administration,
Transition – A Presidential Change Update
, February 28, 2025 - Loper Bright’s Impact on Government Contract Litigation,
Government Contracts Update
, July 23, 2024 - New Ventures Update – June 2024, June 26, 2024
- Thompson Hine Announces 2024 LCLD Fellows and Pathfinders,
Thompson Hine LLP
, March 7, 2024 - Thompson Hine Elects Eight New Partners in 2024,
Thompson Hine LLP
, January 3, 2024 - New Ordinance Impacts Real Estate Around Wright-Patterson Air Force Base,
Real Estate Update
, October 17, 2023 - Remote Employees With 2 Jobs Pose New Risks To Cos.,
Law360
, April 13, 2022 - Thompson Hine Lawyer Jamar King Named to District Court Local Rules Committee,
Thompson Hine LLP
, January 18, 2022 - Nine Thompson Hine Lawyers Recognized by Lawyers of Color,
Thompson Hine LLP
, April 5, 2021 - Nine Thompson Hine Lawyers Recognized by Lawyers of Color,
Thompson Hine LLP
, April 5, 2021

