**ManTech** seeks a motivated, career and customer-oriented **Principal Exchange Engineer** to join our team in **Chantilly, VA.** The position is **onsite.** **Responsibilities include but are not limited to:** + Responsible for the installation, configuration, maintenance, operations, troubleshooting, and optimizing of Microsoft Exchange server infrastructure. + Monitor, document, and report on system utilization and capacity + Resolve escalated email routing, connectivity, permissions, and filtering support issues + Document processes and procedures and train others + Monitor backups and perform periodic test restores + Performs break/fix troubleshooting, server/software updates and feature enhancements to MS Exchange and Exchange servers, as well as general IT Windows infrastructure. + Designs, develops, tests, debugs and implements Exchange related components, software tools and utilities + Ensures that system improvements and patches are successfully implemented and monitored to increase efficiency + Generates systems software engineering policies, standards and procedures + Requires specialized Exchange expertise and general knowledge of related areas + Solves complex problems; takes a broad perspective to identify innovative solutions + Works independently, with guidance in only the most complex situations + May lead functional teams or projects **Minimum Qualifications:** + Bachelor’s degree and 7+ years of relevant Microsoft Exchange experience. Additional 4 years of experience can be substituted in lieu of a degree + Expert-level knowledge of Microsoft Exchange Server technologies, including on-premise + Deep understanding of Active Directory, DNS, and DHCP + Experience with Exchange server upgrades, migrations, and deployments + Strong troubleshooting and problem-solving skills + Knowledge of email security technologies, such as email content filtering + CASP+ certification within 6 months of hire + DoD 8570 Computing Environment certification within 6 months of hire **Preferred Qualifications:** + One of the following certifications is desired: MCSE - Microsoft Certified System Engineer, MCSE - Microsoft Certified Solutions Expert, MCSA - Microsoft Certified Solutions Associate, MCITP - Microsoft Certified Information Technology Professional, VMware VCP - VMware Certified Professional, CCNA - Cisco Certified Network Administrator + ITIL Foundations or later certification highly desired + Experience using a Service Desk ticketing system, such as TrackIT or ServiceNow + Previous customer service experience strongly desired **Clearance Requirements:** + US Citizenship required and active TS clearance adjudicated within the last 6 years. + Candidate must be open to Poly if selected by the customer **Physical Requirements:** + Must be able to remain in a stationary position 50%. + Frequently communicates with co-workers, management, and customers, which may involve delivering presentations; must be able to exchange accurate information in these situations. ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran. If you are a qualified individual with a disability and require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please email us at careers@mantech.com and provide your name and contact information.