TISTA Science & Technology
Mark Callejo is a Senior System Administrator with experience in managing data center infrastructure, building connectivity, system backups, system administration, managing printer landscape, and asset management. Mark has worked at TISTA Science and Technology Corporation, SPAARK, Inc., KGS (Kforce Government Solutions), YES Collision Inc., and Motorola Solutions in various capacities related to IT and network management.
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TISTA Science & Technology
TISTA is a Service-Disabled Veteran-Owned Small Business located in Rockville, MD.