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Marcus Costello has a diverse work experience spanning over several companies and roles. Marcus is currently employed as an Information Technology Specialist at Reviver, starting in October 2022. Prior to this, Marcus worked as a System Administrator at Truebeck Construction from September 2018 to January 2022. Marcus also served as a Technical Support Manager at Stellar Labs, Inc. from June 2017 to April 2018.

In their previous roles, Marcus worked as a Lead IT Support Engineer at NovelAspect from March 2015 to April 2017, where they managed a team of nine direct reports and ensured smooth data network operations. Marcus also handled inbound calls for service-related inquiries from hosted clients. Before that, they held the position of System Administrator at VN Transportation Services from January 2012 to January 2014.

Marcus started their career as a Project Coordinator at Powersmith Electric from January 2009 to January 2012 and began working as a Senior Desktop Support Specialist at Akimbo Services from January 2006 to January 2009.

Overall, Marcus Costello has gained valuable expertise in various IT-related roles throughout their career.

Marcus Costello's education history includes an Associate of Arts and Sciences (AAS) degree in Business Administration and Management, General from San Francisco State University, which they completed in 2007. In 2017 to 2018, they obtained a certificate in Full Stack Web Developer from Udacity. Additionally, they pursued an Associate's degree in Business Administration and Management, General from the College of San Mateo, although the start and end years are not specified. Marcus also holds several certifications, including Microsoft Azure Administrator from Pearson VUE obtained in April 2021 and Exam Tips: Microsoft Azure Administrator (AZ-104) from LinkedIn obtained in December 2020. Furthermore, they have obtained certifications such as Box.com Essential Training from LinkedIn in October 2019 and Learning Mac OS X Troubleshooting from LinkedIn in September 2018. It is also mentioned that they have pursued a certification in Technology Management from UCSB Extension, but the specific month and year of obtaining it are not provided.