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About Us

Learn More About Sebald, Hackwelder & Knox

Our practice and experience focus on aggressive criminal defenseDUI defensepersonal injury, and child services investigations throughout Pennsylvania. If our team of experienced attorneys at Sebald, Hackwelder, & Knox are unable to take your case – we will be sure to refer you to another qualified attorney in Erie, PA.

Meet Attorney Douglas Sullivan

Douglas Sullivan

Douglas hails from Montgomery County, a Philadelphia suburb, where he started his legal career at a default servicing firm representing lenders in mortgage foreclosure actions. In Montgomery County, Douglas served his community as a member of the Office of Drug and Alcohol Planning Council where he learned about how drug and alcohol services are provided. While in Montgomery County, Douglas was elected the Township Auditor and served on boards with community focused organizations. Presently, Douglas is a volunteer mock trial coach for a local Erie County high school’s mock trial team.

In 2018, Douglas moved to Erie, where he joined the District Attorney’s Office as a prosecutor. He handled everything from traffic citations up to homicides and appeals, specializing in Treatment Court focusing on mental health, drug and alcohol treatment, as well as working with the Office of Veteran Affairs to serve justice involved veterans. Douglas also specialized in asset forfeiture for the District Attorney’s Office. In 2021, Douglas joined the Pennsylvania Office of Attorney General, where he worked in the Environmental Crimes Section and the Criminal Prosecution Section. As a Deputy Attorney General, he handled investigatory grand jury cases and appeared before multiple trial courts across northwestern Pennsylvania to handle a variety of criminal matters.

Douglas graduated from Kutztown University with a double major in Special Education and Elementary Education in 2011. In 2015, Douglas graduated from Duquesne University School of Law, where he competed in the Buffalo-Niagara Invitational Mock Trial competition and interned in the Allegheny County District Attorney’s Office, as well as the Philadelphia District Attorney’s Office. 

With these experiences, Douglas offers a unique background and perspective on how to provide client-first legal services in a wide array of legal matters, including criminal defense and family law. 

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