Douglas Derby and Barbara Carol Bernthal of Beaufort announce the engagement of their daughter, Karen Lynn Bernthal of Beaufort, to Christopher Lee Vaigneur of Beaufort, son of Robert Hugh and Lili Kay Vaigneur of Beaufort. The bride-elect graduated from the University of South Carolina with a Bachelor of Science degree in Business Administration. She is employed as a Financial Management Analyst at Marine Corps Recruit Depot, Parris Island. The groom-elect graduated from the University of South Carolina with a Bachelor of Science degree in Biology. He is employed as an Environmental Health Manager at DHEC. A June wedding is planned.