Mark Sebastian

Mark Sebastian is a seasoned professional with extensive experience in service operations and client management across various telecommunications organizations. Currently serving as the Senior Service Operations Manager at Calero-MDSL since October 2020, Mark leverages a background that includes roles such as Managed Services Specialist at Jett Enterprises and Client Services Manager at CenturyLink. Previous positions at AT&T, including Director IT and Client Service Director, underscore a strong foundation in lifecycle management and client support. Mark's educational background includes a Bachelor's degree in Telecommunications Technology from the US Army Signal Corps.