About us

About The Firm

A Well-Prepared, Hardworking Team of Lawyers Ready To Serve You.

Attorneys Jonathan Chieppor and Alex Egner are both long-time residents of Lancaster County and dedicated partners at Chieppor & Egner. The firm was founded to serve the community through legal counsel delivered at a personal level. Clients can expect a professional, reasonable, and friendly experience through what can be the most difficult time of a person’s life.

With his years working for the district attorney’s office as a foundation, attorney Jonathan Chieppor uses his extensive knowledge of the criminal justice system to protect the rights of the accused. He is a trial-hardened attorney who will fight for his clients in pursuit of favorable outcomes.

Alex Egner is also a Lancaster-based attorney with years of experience throughout south-central Pennsylvania. Attorney Egner handles a range of practice areas. He has spent a significant amount of time working in the criminal justice system. As a general practice Lancaster attorney, Alex is able to guide you through complex and difficult legal processes.

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Attorney Jonathan Chieppor:

A Serious Student Who Became A Prosecutor

Mr. Chieppor graduated from Manheim Township High School, after which he attended Saint Joseph’s University and received a bachelor of science degree in criminal justice. While attending university, he interned for a local personal injury firm where he was involved in the litigation of personal injury cases, gaining experience in intake, mediation, and final settlements.

Following his undergraduate years, attorney Chieppor attended Temple University’s Beasley School of Law, where he graduated with a joint focus in business litigation and trial advocacy. While at Temple University, attorney Chieppor clerked at a small law firm where he learned the finer details of running a law firm while also representing clients to one’s greatest ability. During his tenure as a clerk, he participated in building a defense for a client charged with first-degree murder.
Upon graduating from Temple University, attorney Chieppor began working for the Lancaster County District Attorney’s Office where he litigated everything from summary traffic offenses to the most serious felonies.
As a prosecutor, he was the lead prosecutor on all auto theft investigations and litigation in Lancaster County. He was also a member of the DUI team with strong trial outcomes. Today, he zealously and skillfully defends people charged with DUI and other crimes.

About Attorney Alex Egner

A Military Background And Diversified Legal Experience

Alex Egner was born and raised in Lancaster County. After graduating from Lampeter-Strasburg High School, he joined the U.S. Army and became a military police officer. Alex received the same training that federal police officers receive. He knows the ins and outs of the criminal justice system. At Dickinson College, he was the first-ever triple major in political science, history, and Middle Eastern studies while earning a security certificate in conjunction with the U.S. Army War College.

After a short period of active duty, Alex returned to school at the Penn State Dickinson School of Law, where he was the Sydney D. Kline Legal Scholar. He clerked at a general practice law firm for two years and worked at the Lancaster County Public Defender’s office. He did an externship at the auditor general’s office, writing legal briefs and preliminary objections in lawsuits before the highest levels of court in Pennsylvania.

Alex was an assistant district attorney. While a prosecutor, he had several jury and bench trials and practiced before the Lancaster courts. Alex was assigned and handled the most serious of cases, and he was trained and worked in the general trial unit, the DUI unit, the domestic violence unit, and the juvenile unit. He was the head of the expungement unit, the welfare fraud division, and small games of chance/bingo law issues.

Attorney Egner was a district attorneys’ representative on the veterans’ treatment court team and worked with the drug court team as needed. His diverse legal experience allows him to approach each client’s case from a base of knowledge and confidence.
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Mark F. Walmer:

Of Counsel

Mark Walmer, Esq. has been practicing in the State of Pennsylvania for over 35 years, during which he served as Assistant District Attorney in Lancaster, PA, and Assistant Public Defender of Lancaster County. Through his hard work and dedication to the legal field, he has developed a reputation throughout the surrounding community as a trustworthy and compassionate attorney who truly cares about helping his clients. Mark is a member of the American Bar Association, Pennsylvania Bar Association, Lancaster Bar Association, and other organizations.

Mark’s current practice is limited to clearing criminal records through Applications for Clemency and Expungements.

Mark F. Walmer
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Mark F. Walmer:
Attorney at Law

Mark Walmer, Esq. has been practicing in the State of Pennsylvania for over 35 years, during which he served as Assistant District Attorney in Lancaster, PA, and Assistant Public Defender of Lancaster County. Through his hard work and dedication to the legal field, he has developed a reputation throughout the surrounding community as a trustworthy and compassionate attorney who truly cares about helping his clients. Mark is a member of the American Bar Association, Pennsylvania Bar Association, Lancaster Bar Association, and other organizations.

Mark’s current practice is limited to clearing criminal records through Applications for Clemency and Expungements.

Born and raised just north of Lancaster in Elizabethtown, Pennsylvania, Mark is a graduate of Pennsylvania State University and Franklin Pierce Law Center (now known as the University of New Hampshire School of Law). He was also a Research Fellow at Harvard Law School in the Spring of 1987.

Sally Rivera

Paralegal

Sally Rivera majored in Paralegal Science at Central Penn College and received her Associate’s Degree in September of 2020. While pursuing her associate’s degree, Sally Rivera worked for the Lancaster County Courthouse for 13 years. She worked in the Domestic Relations Office as a Clerical Specialist and as a Court Specialist in Domestic Violence Central Court where she worked closely with the Assistant District Attorneys’, Defense Attorneys’ and Magisterial District Justices in processing criminal cases and entering dispositions in court. She is currently enrolled at Central Penn College to continue her education to obtain her Bachelor’s Degree in Legal Studies.

Not only does Sally possess experience working in the legal field and the court systems, but Sally is also fluent in the Spanish and English languages. She was born and raised in Lancaster County but is also a native of the island of Puerto Rico, where both of her parents are from.

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Maria Osuna:

Paralegal

Maria Osuna was born in San Diego, California, but was raised in Lancaster County, where she has lived with her parents and four younger siblings. Having grown up in a Mexican-American household, Maria is fluent in both English and Spanish.

After graduating from Lancaster Mennonite High School in 2017, Maria continues to actively participate in the betterment of her community. She went on to work at PA Careerlink as an Intern, where her primary focus was to help job seekers in Lancaster City join the workforce.

Maria worked alongside Career Navigators in the WIOA program, Re-entry program, as well as other skill training programs.

She went on to attend Harrisburg Area Community College (HACC), where she earned her Paralegal Associate in May 2020. During her time at HACC, Maria took classes in Business Law, Contract Law, Criminal Law, Family Law, Legal Research, and Writing. While in school, Maria interned at another Lancaster firm.

About Your Legal Concerns: Put Experience On Your Side

With a rich foundation of experience relevant to your case, we are eager to explain how we can help you resolve your legal problems.
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