Following graduation with distinction from Southwestern University School of Law in 1982, Greg worked as an associate for Achor and Miller, became a partner with Achor, Miller & Spaulding in 1987, and started his own firm in 1992. He is an experienced trial attorney representing business owners, individuals, contractors, public and private entities, hospitals, and doctors in the litigation of business disputes, personal injury, construction claims, medical malpractice, employment claims, probate disputes, and other matters. Greg has conducted more than forty legal seminars, helping people better understand the legal system. He also taught Health Care Law in the Business Administration Masters Degree Program at the University of San Francisco.

Greg is a member of the Sonoma County Bar Association, American Bar Association, and Association of Defense Counsel of Northern California. He has served for more than ten years on the board of directors of MOVES, a nonprofit organization dedicated to reducing violence through public education, and spent ten years on the board of the Northern California Center for Well Being, and three years on the Allocations Committee for United Way. In addition, Greg volunteers his time for the Institutional Review Committee at Santa Rosa Memorial Hospital, Sonoma County Legal Aid, the Sonoma County Bar Association, and as a Settlement Conference Panelist for the Sonoma County Superior Court.