New Leasing Business: 501 Newton Street, a shopping center on Route 116 in South Hadley, MA. Don Mace is handling the assignment. New Employees: Sarah Adler joined the Ashburn, VA office at One Loudoun as a Property Operations Assistant. Sarah Burke joined the Plymouth, MA office at Colony Place as a Property Manager. Leng Ung joined the Burlington, MA office as an Assistant Property Manager. Kim Perry has been promoted from Assistant Property Manager to Property Manager in the Burlington, MA office.