He is triple board certified by the American Board of Professional Liability Attorneys in medical malpractice where he also serves on the board and by the National Board of Trial Advocacy as a civil trial advocate and in civil pretrial practice advocacy. He is a diplomate with the National College of Advocacy of the American Association of Justice.

He is AV rated by Martindale-Hubbell and certified by the South Carolina Supreme Court as a civil circuit court mediator.

As an adjunct professor at the Charleston School of Law, Justin teaches civil pretrial practice and deposition skills.

For almost 30 years, he has authored the South Carolina Rules Annotated and the South Carolina Rules of Evidence Annotated used by judges and attorneys throughout South Carolina.

He is a member of various professional organizations including the American Association for Justice, South Carolina Association for Justice, South Carolina Bar Association, American Bar Association, permanent member of the Fourth Circuit Judicial Conference, MENSA and the International Brotherhood of Magicians.

He has practiced in state and federal courts throughout the country. He is admitted to practice before the United States Supreme Court, United States Fourth Circuit Court of Appeals, United States Third Circuit Court of Appeals, United States Second Circuit Court of Appeals, United States Court of Federal Claims, United States District Court for the District of South Carolina and the South Carolina Supreme Court.

He has argued appellate cases before the South Carolina Supreme Court and Court of Appeals, as well as Fourth and Second Circuit Courts of Appeal.