Berg taught physical education in Clyde, New York, from 1942-47 and then came back to the area to teach physical education at Falconer Central School from 1947-1954 and wound up teaching at Southwestern from 1960-1981. She coached the first girls'softball team at Southwestern and led the Lady Trojans to five straight league titles and won a Section 6 Class B title. For 21 years, Berg directed the Southwestern Gym Club and promoted gymnastic sport in the area in addition to receiving a coaching award for 20 years service from the Southwestem Athletic Department.
When not involved in coaching, Berg was an outstanding tennis player. She won the Jamestown City Championship from 1933-1938, 1947-1951, 1953-1954, 1956-1961. Additionally, she was the Chautauqua County champion in 1957 and 1958.
Berg was a Western New York singles winner in 1960 preceded in 1959 by a WNY doubles title. She was also a singles finalist in 1957, 1958 and 1959. In 1937, Berg won the Great Lakes Girls' championship in Erie, Pennsylvania. The same year she was a finalist in the Great Lakes Women's championship. Later she won the Great Lakes title in 1947, 1957, 1958 along with the championship of the Southern Tier in 1938 and championship of Cortland County in 1940 and 1941.
Berg was ranked as a Class A player by the United States Lawn Tennis Association and advanced to the third round of the National Grass Court Championships in 1936 at the Philadelphia Cricket Club. That same year she competed in the National Public Parks Tournament in Pittsburgh.
From 1951-1960, Berg helped organize the Western New York Tennis Tournament and she taught skiing at Allegany State Park and in Jamestown. She was involved in Junior Olympics, the Southwestern Ski Club, motocross, was a 4-H horse show announcer and scorekeeper, and 4-H leader of Kiantone Karallers.
Berg groomed and showed horses with her daughter, Siri. She was also on the pit crew with her son, Chris, for motocross races. After retiring from Southwestern in 1981, Berg became a volleyball and track official.