Counsel, Keller Postman LLC
John Masslon is a Counsel at Keller Postman LLC, where he works on a broad range of disputes, including products liability and consumer protections suits. He helps develop legal strategies, writes briefs, and presents argument on legal questions. Before joining Keller Postman, John was senior litigation counsel at Washington Legal Foundation. There, he wrote about 100 amicus briefs supporting free enterprise in courts across the country. He filed the first amicus brief in the Supreme Court supporting the challenge to OSHA’s vaccine mandate. He also filed a brief supporting ending the in-house proceedings at the Securities and Exchange Commission. Previously, John served as assistant solicitor general in a state attorney general’s office. There, he was first chair in a federal trial challenging a state election law that was ultimately upheld. He also wrote the briefs that convinced the state supreme court to uphold the State’s right-to-work statute.
John obtained his B.S. in economics with a minor in mathematical sciences from Clemson University. He then received his J.D. and LL.M. in Taxation from Georgetown University Law Center. After law school, John worked for Judge Arthur J. Schwab of the United States District Court for the Western District of Pennsylvania and clerked for Judge Judith Ference Olson of the Superior Court of Pennsylvania.
Counsel, Keller Postman LLC
John Masslon is a Counsel at Keller Postman LLC, where he works on a broad range of disputes, including products liability and consumer protections suits. He helps develop legal strategies, writes briefs, and presents argument on legal questions. Before joining Keller Postman, John was senior litigation counsel at Washington Legal Foundation. There, he wrote about 100 amicus briefs supporting free enterprise in courts across the country. He filed the first amicus brief in the Supreme Court supporting the challenge to OSHA’s vaccine mandate. He also filed a brief supporting ending the in-house proceedings at the Securities and Exchange Commission. Previously, John served as assistant solicitor general in a state attorney general’s office. There, he was first chair in a federal trial challenging a state election law that was ultimately upheld. He also wrote the briefs that convinced the state supreme court to uphold the State’s right-to-work statute.
John obtained his B.S. in economics with a minor in mathematical sciences from Clemson University. He then received his J.D. and LL.M. in Taxation from Georgetown University Law Center. After law school, John worked for Judge Arthur J. Schwab of the United States District Court for the Western District of Pennsylvania and clerked for Judge Judith Ference Olson of the Superior Court of Pennsylvania.
David Johnson is a partner at Holtzman Vogel and focuses his practice on political and election law regulatory compliance, appellate law, and state attorneys general investigations and litigation.
Prior to joining the firm, David was Policy Director and General Counsel to the Republican Attorneys General Association, as well as serving as president for the Rule of Law Defense Fund and Center for Law and Policy. In these roles, he worked closely with Republican attorneys general and their staff on developing and advancing policy priorities. He has also worked with President Trump's administration and other leading Republican political and conservative policy organizations with respect to key policy initiatives.
Previously, David was Senior Counsel with the Office of the Indiana Attorney General where he advised the Attorney General on strategy with respect to litigation, communications, complex legal objectives, and policy goals. Prior to joining the Indiana Office of Attorney General, David served as Corporation Counsel for Lawrence, Indiana. In that role, David advised on myriad issues including municipal bonding, human resources, and capital projects. And before that, David served as Deputy General Counsel and Policy Director for Governor Mike Pence, providing strategic counsel to the Governor on litigation, policy, crisis communications, and legislative strategy, as well as guiding policy efforts on gaming issues in Indiana.
He earned his AB from Wabash College, and his JD from the Indiana University McKinney School of Law.
Counsel, Keller Postman LLC
John Masslon is a Counsel at Keller Postman LLC, where he works on a broad range of disputes, including products liability and consumer protections suits. He helps develop legal strategies, writes briefs, and presents argument on legal questions. Before joining Keller Postman, John was senior litigation counsel at Washington Legal Foundation. There, he wrote about 100 amicus briefs supporting free enterprise in courts across the country. He filed the first amicus brief in the Supreme Court supporting the challenge to OSHA’s vaccine mandate. He also filed a brief supporting ending the in-house proceedings at the Securities and Exchange Commission. Previously, John served as assistant solicitor general in a state attorney general’s office. There, he was first chair in a federal trial challenging a state election law that was ultimately upheld. He also wrote the briefs that convinced the state supreme court to uphold the State’s right-to-work statute.
John obtained his B.S. in economics with a minor in mathematical sciences from Clemson University. He then received his J.D. and LL.M. in Taxation from Georgetown University Law Center. After law school, John worked for Judge Arthur J. Schwab of the United States District Court for the Western District of Pennsylvania and clerked for Judge Judith Ference Olson of the Superior Court of Pennsylvania.
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