ManTech seeks a motivated, career and customer-oriented **Senior Network Administrator** to join our team in **Stennis, MS** . **Responsibilities include but are not limited to:** + Design, install, maintain, and configure L2 and L3 network equipment (routers, switches, etc.) + Develop strategic plans for network development and expansion. + Coordinate installation of new hardware/software + Monitor network performance to identify and resolve issues quickly and effectively utilizing network management systems and tools + Assist with incident management, problem management, and change management tickets. Will also train and offer guidance/direction to less experienced network administrators. + Develop and implement disaster recovery programs. + Follow organizational IT security procedures for network setup, installing firewalls, VPN, IDS/IPS, etc. and monitoring system logs for signs of intrusions. **Minimum Qualifications:** + 9+ years of related experience and a Bachelor's degree in information technology, computer science, finance, business management, or related degree + An IAT II certification + Understanding of Network Protocols + Strong Troubleshooting skills + Good communication **Preferred Qualifications:** + Any of the following certifications: CCNA, Agile, ITIL **Clearance Requirements:** + Must have a current/active Secret clearance with the ability to obtain and maintain a TS/SCI. + The ability to obtain and maintain a DHS EOD suitability is required prior to starting this position. **Physical Requirements:** + Must be able to remain in a stationary position 50% + Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer + The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc. 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.