Southern Management Companies | 9,849 followers on LinkedIn. Southern Management Companies – a privately held real estate firm – owns and manages 24,000 apartment-homes, office centers, and a ski resort –all in the mid-Atlantic region. Established in 1965, Southern employs more than 1,200 people. Southern Management Companies is the recent recipient of four regional awards: The Maryland Performance Excellence Award, Washingtonian Magazine’s "Great Places to Work,” Baltimore Sun’s “Top Work Places” and Baltimore Magazine’s “Best Places to Work.”