Employment Opportunities Costello Property Management employs many people in the Midwestern region. If you'd like to be considered for employment at any of our sites please send a letter of interest to: Jeff Kogel Director of Property Management PO Box 2238 Sioux Falls, SD 57101 Or email it to jkogel@costelloco.com Current Employees If you are currently one of our valued employees please log in below. User: Password:   If you are experiencing problems with this section of the website please contact your direct supervisor.