Atlantic Casualty Insurance Company (ACIC). formed by Strickland Insurance Group (SIG) in 1983 and acquired by Auto-Owners Insurance Group in 2016, maintains an A.M. Best rating of A. With offices in Goldsboro, NC. Hartford, CT. Scottsdale, AZ. Richmond, VA. Atlantic Casualty has authority in fifty states and Washington, DC. We value our employees and believe embracing diversity of thought aides in fostering a culture of belonging. where all are ...