About John O'Neill

John 'Jack' O'Neill is an experienced attorney who was counsel for the Philadelphia Building Trades and the International Brotherhood of Electrical Workers Local 98, handled civil litigation with a private firm and spent a decade as a city prosecutor, where he was lead counsel on some of the city's high-profile criminal trials. At Kline & Specter, O'Neill focuses on workplace and construction site injury litigation and other catastrophic injury litigation. Immediately prior to joining the firm, O'Neill, a Philadelphia native, represented the Philadelphia Building Trades and was counsel and chief of staff for IBEW Local 98, developing a deep relationship with Philadelphia's labor community. Before that, he worked with the private Center City law firm of Schatz and Steinberg, P.C., where he practiced civil and criminal litigation.

With the Philadelphia District Attorney's Office, O'Neill gained extensive experience starting with the Municipal Court Unit, then to Juvenile Court cases, the Family Violence and Sexual Assault Unit, then to working in the Homicide and Special Investigations units. He won more than 100 jury trials and several hundred bench trials. O'Neill won a verdict and prison sentence of 50 to 100 years in the trial of the so-called Kensington Rapist, Marcos Camacho, one of the worst serial rapists in Philadelphia history. In another case, O'Neill won a conviction in the first case in Pennsylvania in which, arguing a person's rights under the Americans with Disabilities Act, he was allowed to have a victim with cerebral palsy testify using an alternative means of communication, namely a speech pathologist serving as an expert/translator, a method upheld upon appeal by the Pennsylvania Supreme Court.

O'Neill used the case as the basis for a lecture on how to represent victims with similar disabilities that he gave before the National Conference on Crimes Against Women. He later discussed the case in an article he authored titled 'Everyone Has a Voice: A Multiple Disciplinary Case Study,' for the journal Sexual Assault Report. In another high-profile win, O'Neill secured a guilty verdict in a cold-case murder that occurred in front of the Philadelphia Art Museum during the city's Independence Day fireworks show. O'Neill also worked with various law enforcement agencies, including the FBI and Homeland Security, in coordinating an investigation that led to the arrest and conviction of Wayne Prater, who had built a bomb that, if detonated, could have created an explosion radius larger than Lincoln Financial Field.

O'Neill has been selected to speak at a number of forums on various topics, including about representing people who are disabled and cases involving crimes against women. He also worked with Children's Hospital of Philadelphia to help train nurses on testifying in cases of sexual assault. O'Neill is the president of Young Organized Philadelphia, an AFL-CIO affiliated workers advocacy group. He served as Secretary for the Brehon Law Society, an organization for lawyers and judges of Irish descent.

Proven verdicts and settlements at Kline & Specter, PC

These results are credited to Kline & Specter, PC. A result appears under an attorney's own name only when a published source names them as counsel on the case.

A Philadelphia jury found that Monsanto failed to warn that Roundup could cause cancer and awarded John McKivison $2.25 billion. The trial judge later reduced the award to $400 million.

Philadelphia County, PA · 2024Product LiabilityRead the full story →

After Amtrak Train 188 derailed in Philadelphia in May 2015, killing eight and injuring more than 200, Kline & Specter's Thomas R. Kline led the plaintiffs' negotiations that produced a $265 million settlement fund for the victims.

Philadelphia, PA (federal) · 2016Wrongful DeathRead the full story →

A Philadelphia jury found the Hospital of the University of Pennsylvania liable for the brain injury a newborn suffered when staff delayed a cesarean section, a $182.7 million verdict that grew to a molded judgment of about $207.6 million, the largest medical malpractice award in Pennsylvania history. Kline & Specter argued and won the appeal, where the Pennsylvania Superior Court affirmed the full $207.6 million judgment in July 2025.

Philadelphia County, PA · 2025Medical MalpracticeRead the full story →

A Philadelphia jury awarded Ernest Caranci $175 million after finding that decades of Roundup use caused his non-Hodgkin lymphoma and that Monsanto failed to warn of the risk. Kline & Specter tried the case, the first Roundup trial in Philadelphia, and the verdict was later upheld on appeal.

Philadelphia County, PA · 2023Product LiabilityRead the full story →
$153 millionVerdict

A federal jury in Nevada found Ford's pickup parking brake defective and held that the company should have warned owners, returning a verdict near $153 million after three-year-old Walter White was killed by a truck that rolled in the family driveway. Shanin Specter of Kline & Specter tried the case.

Reno, NV · 1998Product LiabilityRead the full story →

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.

Practice areas

Education

Florida State University
Law Degree

Other attorneys at Kline & Specter, PC

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Proven verdicts and settlements from other Philadelphia firms

Saltz Mongeluzzi & Bendesky
Saltz Mongeluzzi & Bendesky
$1.02 billion · Champlain Towers Collapse: $1.021 Billion for 98 Victims in Under a Year
Feldman Shepherd Wohlgelernter Tanner Weinstock Dodig
Feldman Shepherd Wohlgelernter Tanner Weinstock Dodig
$160 million · U-Haul Pays $160 Million After Overfilled Propane Tank Kills Food Truck Owner and Her Daughter
Ross Feller Casey
Ross Feller Casey
$85 Million Verdict for Penn Med Student Who Fell 18 Feet Into Open Center City Manhole
Anapol Weiss
Anapol Weiss
$1.6 billion · 104 Women Win $1.6 Billion Against Long Island Pediatrician Stuart Copperman
The Beasley Firm, LLC
The Beasley Firm, LLC
$907 million · Maddux Family Wins $907 Million Wrongful Death Judgment Against Fugitive Ira Einhorn

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.