Thomas A. Leonard III

After nearly thirty (30) years of distinguished full-time practice in the area of Construction Law, Margaret Underwood is now Of Counsel to Horn Williamson. During her full-time practice of law, Ms. Underwood provided high-level legal services to local, national, and international owners, contractors, and subcontractors on many of the largest and most prestigious construction projects located in and around the Philadelphia Area and as far away as Europe and the Marshall Islands. Her extensive...

Dianne M. Nast is a magna cum laude graduate of Rutgers University School of Law. She is the founder and senior member of NastLaw LLC in Philadelphia. For almost 20 years, she was a senior shareholder with the Philadelphia law firm of Kohn, Nast & Graf, P.C. (now Kohn, Swift & Graf, P.C.), and then a senior shareholder at RodaNast, P.C. from 1995 to 2012. Ms. Nast, an active member of the bar for over four decades, has extensive experience in complex litigation. She has a reputation f...

Joshua C. Cohan is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs and Personal Injury Litigation - Plaintiffs. Joshua C., who practices law in Philadelphia, Pennsylvania, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joshua C. is held by other top lawyers in the same geographic and legal practice area.

Leah Cilo is a top attorney recognized by Best Lawyers in the practice area(s) of Workers' Compensation Law - Claimants. Leah, who practices law in Philadelphia, Pennsylvania, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Leah is held by other top lawyers in the same geographic and legal practice area.

Willig, Williams & Davidson Partner James S. Beall advises and represents a wide variety of public and private-sector single and multi-employer funds on comprehensive employee benefit and tax matters. He specializes in employee benefits law for the firm’s joint labor-management pension and welfare fund clients, as well as its labor union clients. Jim also represents workers in the longshore, transportation, baking, construction, hospitality and public safety industries. Jim serves a...

Mark Mullen has particular experience in federal court procedure, spoliation issues, and the economic loss doctrine.Throughout his career handling subrogation matters for more than 25 years, Mark has investigated fires in refineries, warehouses, commercial properties, and vehicles, as well as explosions, building collapses, energy losses, machine failures, and floods all over the country and internationally. He has investigated failures in more than 20 states and tried cases or handled appeal...

Brian P. Flaherty is a trial lawyer who handles complex commercial cases. He joined the firm’s Philadelphia office in April 2009 as a member in the Commercial Litigation Group. Prior to joining the firm, he was a partner with WolfBlock LLP in Philadelphia. Brian is a fellow of the American College of Trial Lawyers and is listed in The Best Lawyers in America in the field of Commercial Litigation. Brian represents clients in a wide range of commercial litigation and other disputes, inclu...

Keld R. Wenge is a top attorney recognized by Best Lawyers in the practice area(s) of Workers' Compensation Law - Claimants. Keld R., who practices law in Philadelphia, Pennsylvania, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Keld R. is held by other top lawyers in the same geographic and legal practice area.

Matt Haverstick is a managing partner of the Firm and a partner in the Litigation Department. He represents government officials, private entities, and individuals in high-profile, media intensive litigation and appeals, ranging from major grand jury investigations to Pennsylvania Supreme Court arguments over the constitutionality of state laws. Referred to in media reports as “counsel of choice for state Republicans in a number of recent policy fights” for his work on matters tha...

Edward Rudolph is a top attorney recognized by Best Lawyers in the practice area(s) of Municipal Law. Edward, who practices law in Bensalem, Pennsylvania, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Edward is held by other top lawyers in the same geographic and legal practice area.