His principal areas of practice are civil rights, civil trial, civil and commercial litigation, litigation/trial advocacy/advocacy, and personal injury. Though his office is in Jacksonville, Kowalski offers a substantial amount of assistance to residents of St. John's County. He heads up a Legal Aid Consumer Pro Bono Program, offers training to other potential pro bono attorneys throughout the state through Legal Aid, and is active in both the St. Johns County Bar Association and Jacksonville Bar Association. Kowalski has 30 pending pro bono cases almost entirely in the area of consumer law, mainly foreclosures and collections. For 2008 to 2010, he completed nearly 490 pro bono hours through the St. John's County Legal Aid office.