Greg is a member of the Professional Liability Department whose practice focuses on the defense of corporations and professionals in commercial, construction and class action litigation. He also defends attorneys in legal liability actions covering a wide range of malpractice claims including those arising from civil and family disputes, business transactions in the real estate and oil and gas industries, and commercial litigation.
Greg has substantial experience defending high-value class action cases at both the state and federal level. In doing so, he prioritizes the development of an early case strategy to defeat class certification in order to minimize his clients’ potential liability and damage exposure. He has successfully defeated class certification in multiple jurisdictions for clients facings claims of invasion of privacy, violations of state and federal electronic communication protection acts, and allegations of improper assessment and conversion of state sales taxes. When certification cannot be avoided, Greg develops an aggressive discovery strategy to minimize class size and damage exposure. He has obtained summary judgment dismissals and favorable settlements in class actions in both state and federal court.
Greg's construction practice includes the representation of owners, contractors, and design professionals from defect and commercial loss claims related to the construction industry. He has litigated on behalf of clients in matters arising from publicly and privately-funded projects in state and federal court across the country. He also defends construction entities in the natural gas and energy industry facing high-exposure commercial loss and environmental claims.
Greg has experience litigating on behalf of securities professionals in court and FINRA arbitration. He has successfully assisted financial management companies in responding to administrative investigations brought by state and industry regulatory agencies.
He is also proficient in matters involving significant E-Discovery and document discovery. His experience with managing large-scale E-discovery efforts minimizes unnecessary cost while also allowing Marshall Dennehey to provide the best defense possible for its clients in discovery-intensive cases.
Greg was a 2013 graduate of the University of Pittsburgh School of Law. While in law school, Greg was invited to be a visiting research fellow at the Max Planck Institute for Comparative and International Private Law in Hamburg, Germany. He was also an Articles Editor for the Journal of Technology Law & Policy and a member of two award-winning moot court teams.
Honors & awards
The Best Lawyers: Ones to Watch, Commercial Litigation; Construction Law; Product Liability Litigation - Defendants
2021-2025
The Best Lawyers: Ones to Watch, Litigation - Construction; Professional Malpractice Law
2024-2025
Pennsylvania Super Lawyers Rising Star
2020-2022, 2024-2025
Year joined
2022
Thought Leadership
Invoking the Mandatory Mediation Clause Against Buyers - A Beneficial Strategic Tactic
Pittsburgh
Real Estate E&O Liability
November 1, 2025
When facing claims, Pennsylvania real estate agents too often view the mandatory mediation paragraph found within the Standard Agreement for the Sale of Real Estate as little more than boilerplate.
‘Leveling Up’ the Client Engagement Letter as a Defense Tool
Pittsburgh
Lawyers' Professional Liability
September 1, 2025
Every new matter provides an opportunity for an attorney to refine their skills. Legal Update for Lawyers’ Professional Liability - September 2025 is prepared by Marshall Dennehey to provide information on recent legal developments
Marshall Dennehey Announces 2025 Pennsylvania Super Lawyers and Rising Stars
May 22, 2025
Thirty-three attorneys across Marshall Dennehey's five Pennsylvania offices have been selected to the 2025 edition of Pennsylvania Super Lawyers magazine.
Don’t Reinvent the Wheel: Approaching Gen AI Usage in Litigation
Pittsburgh
Lawyers' Professional Liability
October 10, 2024
Don’t Forget Your Probable Cause Argument in Dragonetti Proceedings
Pittsburgh
Lawyers' Professional Liability
September 1, 2024
Our Lawyers’ Professional Liability Practice Group in Pittsburgh has noticed a growing trend in western Pennsylvania plaintiffs’ practice concerning Wrongful Use of Civil Proceedings tort claims filed by original defendants arising from actions wi Legal Update for Lawyers’ Professional Liability - September 2024 is prepared by Marshall Dennehey to provide information on recent legal developments
Classes/Seminars Taught
AI in the Legal Profession, Marshall Dennehey Client Presentation, September 2024
Co-Taught 'Business Law,' Westminster College, Spring 2015
AV Preeminent®: The highest peer rating standard. This rating signifies a large number of the lawyer’s peers rank him
or her at the highest level of professional excellence for their legal knowledge, communication skills and ethical standards.
Distinguished: An excellent rating for a lawyer with some experience. This rating indicates the attorney is widely
respected by their peers for high professional achievement and ethical standards.
Notable: This rating indicates that the lawyer has been recognized by a large number of their peers for strong ethical standards.
