**ManTech** seeks a motivated, career and customer-oriented **Senior Systems Engineer** to join our team on-premises in **Chantilly, VA.** This is an **onsite** position. **Responsibilities include but are not limited to:** + Support the engineering and development of LAN/WAN-based and remote user solution, upgrades and additions + Develop concepts and solutions, test components and systems, document systems, provide planning services, and integrate approved solutions + Analyze technologies to determine best match to requirements, provide recommendations, support budget analysis and planning, and support managing projects during the system life cycle of program systems + Prepare, manage, review, and provide quality control assessment system accreditation approval packages with full documentation of hardware and software configurations + Plan, test, and integrate solutions approved by the Government + Coordinate with service providers to determine and implement services + Application development, Wed development, integration, and enhancements + Technology studies, analysis, reports, and Integration, Validation, and Verification (IV&V) + Support software development for existing applications and other tools necessary to support each effort + Quality control of development processes, and system life cycle support + Diagnosing and resolving the performance, security, and/or technical challenges related to the systems + Investigating and resolving operational problems in conjunction with other engineering and technical personnel + Writing Standard Operating Procedures (SOPs) to accomplish repetitive tasks + Up to 10% local travel **Minimum Qualifications:** + Bachelor’s degree in IT or Computer Science, or related technical field; Additional 4 years systems engineer experience might be substituted for a degree + 4+ years of related systems engineering experience + DoD 8570.1 / DoD 8140.01 certification (IAT Level II) + Experience with VMware virtualization technologies + Experience in engineering and administrative activities with virtualized environments **Clearance Requirements:** + US Citizenship required, and active Top Secret clearance adjudicated within the last 6 years. + Candidate must be open to polygraph if selected by the customer **Physical Requirements:** + Must be able to remain in a stationary position 50%. + Needs to occasionally move about inside the office to access file cabinets, office machinery, etc. + Often positions self to maintain computers in the lab, including under the desks and in the server closet. + 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.