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MANTECH seeks a motivated, career and customer-oriented Senior Systems Administrator to join our team in Washington, DC . Responsibilities include but are not limited to: Serves as a Customer Advocate supporting VIP level customer; must present professional image and communicate well. Provides in-person, white glove support to key stakeholders. Responsible for providing support to end-user community on difficult hardware, software and network related problems, questions, and use. Provides resolutions to out of the ordinary issues for users. If unable to diagnose problem, will work with... more ->