**Mantech** seeks a motivated, career and customer-oriented **Network Administrator** with a focus on Cisco Networks to join our team in **Laurel, MD** . You will be part of a mission-driven team delivering enterprise infrastructure capabilities to support a global workforce engaged in national defense operations **Responsibilities include, but are not limited to:** + Maintain and upgrade network infrastructure, including routers and switches + Update and configure antivirus software and other tools to secure the network + Apply Security Technical Implementation Guide (STIG) updates to switches and follow Software Test and Evaluation (STE) policies + Design and plan Cisco NEXUS network infrastructure, including setup and ongoing maintenance + Configure Remote Authentication Dial-In User Service (RADIUS) for switch administration + Use network monitoring and management tools such as Solarwinds to oversee network performance + Must be willing to work a flexible schedule between 6:00am-6:00pm and may be assigned to an evening patching schedule **Minimum Qualifications:** + Bachelor’s degree in a technical discipline from an accredited college or university with 12+ years of experience as a Network Administrator. 3 additional years of Network Administration experience with an associate’s degree OR 8 years of additional experience and a high school diploma might be substituted + Demonstrated experience downloading software and upgrading Cisco switches and firewalls + Strong technical background in Cisco FirePower Firewalls + IAT II certification (DoD 8140 required within 60 days of starting employment. Acceptable certifications include CCNA-Security/CySA+/GICSP/GSEC/Security+ CE/CND/ or SSCP) **Preferred Qualifications:** + Familiarity with configuring, scripting, and managing Unix, RHEL and Windows operating systems + Familiarity with Scanboy + Familiarity with JIRA ticketing system + Familiarity with Enclave environments + Familiarity with Solarwinds + Familiarity using LatteART and XACTA **Clearance Requirements:** + Must have a current/active TS/SCI with Polygraph **Physical Requirements:** + The candidate must be able to move, carry, and deliver workstations from the office to the customer’s desk + The person in this position must be able to remain in a stationary position 50% of the time + Must communicate with co-workers, management, and customers via email, phone, or virtual meetings, 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.