Mr. Griffin's immigration practice focuses on deportation defense and criminal-immigration matters, agency and federal court appeals, asylum law, Adam Walsh Act and Violence Against Women Act cases, U-visa, and all matters of family immigration an naturalization.

In addition to his private law practice, Mr. Griffin volunteers at the legal clinic of the Irish Diaspora Center, frequently teaches continuing legal education courses to fellow lawyers, has been a human rights investigator and adjunctx law professor, has appeared on television and radio as an advocate and advisor, and has been active in Philadelphia area Gaelic sports and competitive cycling.

Mr. Griffin speaks Spanish and Haitian Creole.

Before becoming an immigration lawyer in 2002, Mr. Griffin was a teacher at a mission school for underprivileged students in New York City, and spent 10 years as a U.S. Probation and Parole Officer in Brooklyn and Boston, where he supervised and integrated federal offenders into their communities, and became an expert at the U.S. Sentencing Guidelines in service to the federal judges in the Eastern District of New York and the District of Massachusetts. 

Since becoming an immigration lawyer, Mr. Griffin has led human rights investigations in Mexico and Haiti, and published several reports that have brought him to testify to the Congressional Black Caucus, the Canadian Parliament, and to meetings at the U.S. National Security Agency, Department of Homeland Security, and White House Office of Faith Based Initiatives. He also co-founded a health and human rights clinic in Haiti's notorious slum of Cite Soliel, has been an adjunct professor of Human Rights at Drexel University Law School.