Mark A. Grilliot is a Partner at Boggs, Avellino, Lach & Boggs, where he concentrates his practice in complex civil litigation with a particular emphasis on transportation and trucking matters, construction-related disputes, and insurance defense. He has been recognized as a Best Lawyers Ones To Watch and Missouri Super Lawyers honoree, reflecting his professional achievements and peer recognition within the legal community. Mark defends carriers and drivers in catastrophic injury and wrongful death cases and advises clients on regulatory compliance, safety protocols, and risk management strategies. In addition to his litigation practice, he counsels employers and businesses on ADA compliance, contract negotiations, and corporate governance, helping clients implement effective compliance programs, respond to claims, and proactively reduce legal exposure.

Mark represents insurance carriers, transportation companies, and business entities in high-exposure litigation, including complex, multi-party disputes. His practice spans a wide range of matters, including construction defects, insurance coverage, employment law, premises liability, pharmacy defense, civil rights / ADA defense, professional negligence, toxic torts, asbestos exposure, copyright matters, and general insurance defense.

A client-focused advocate, Mark is known for delivering strategic, results-driven representation tailored to each client's unique business objectives. He works closely with clients to manage risk, control costs, and achieve efficient, favorable outcomes in both litigation and advisory matters.

As a Partner, Mark plays a key leadership role within the firm, overseeing litigation teams and managing cases from inception through resolution while guiding strategy in high-stakes matters. He is also actively involved in mentoring attorneys and contributing to the firm's continued growth and commitment to client service excellence.

Mark is engaged with the broader legal community and has taught Continuing Legal Education (CLE) courses for fellow attorneys, offering insights into litigation strategy, risk management, and emerging legal issues. Outside the office, he enjoys spending time with his wife and children, volunteering at East Side Heart & Home Family Center, and mentoring young people through mock trial competitions.

He earned his J.D. from Southwestern Law School and his B.S. from Indiana University.

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