Dennis is a member of the Academy of Trial Lawyers of Allegheny County. He is also a proctor in the Maritime Law Association and a member of the Southeastern Admiralty Law Institute. Dennis has served as a Special Master in the Civil Division of the Allegheny County Court of Common Pleas and in the U.S. District Court for the Western District of Pennsylvania.
In July 2012, he was appointed to a three-year term on the Commonwealth of Pennsylvania's Independent Regulatory Review Commission (IRRC), a state commission charged with the oversight and review of all proposed and existing regulations promulgated by various state agencies, authorities, courts or municipal governments.
Dennis has also been actively involved in the community for many years. Currently, he is a trustee of the Historical Society of Western Pennsylvania, chairman of the Borough of West View Zoning Hearing Board and chairs the Municipal Authority of the Borough of West View. Dennis previously served as director of the Board of Education of the North Hills School District for eight years, including two years as its president.
Since 2005, Dennis has been recognized regularly as a Pennsylvania Super Lawyer. Considered among the best in their profession, Super Lawyers represent the top 5% of the practicing attorneys in Pennsylvania. He was also selected nationally by his peers for inclusion in The Best Lawyers In America© 2013, 2014 and 2015 for Insurance Law.