Senior System Administrator

Secure our Nation, Ignite your Future

Become an integral part of a diverse team while working at an Industry Leading Organization, where our employees come first.  At ManTech International Corporation, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

Currently, ManTech is seeking a motivated, career and customer-oriented Senior System Administrator to join our team in our Laurel, MD locations. 

Responsibilities include, but are not limited to:

• This position is a Systems Administrator for CNOS labs.  They will be responsible for maintaining and engineering solutions for networks supporting development systems for all developers.  Must also maintain all lab environments.  Will also work closely with our CNOS labs in other locations.

• Maintain both Linux and Windows systems within the domain architecture to include racking, stacking, loading, and configuring systems (workstations and servers) from the ground up.

• Looking for a candidate with experience with Trellix ePO and Microsoft WSUS

• Candidate must be able to build, configure, and maintain a secure server/system.

• Performs system administration services to analyze network/hardware systems/design/architecture to manage systems of distinct classification levels.

• Complete break/fix actions, and provide support to project and STO activities.

• Performs installation, refresh, and modernization of servers and system components and related services, remotely and on site.

• Configures (and documents configuration of) computers, networking devices and various peripheral equipment.

• Knowledgeable on how to analyze network characteristics (e.g., traffic connect time, transmission speeds, packet sizes, and throughput, latency, capacity, availability), troubleshoots problems, and recommends modification of network configurations.

• Works tickets supporting the above requirements, within service-level agreement timeframes.

• Acts as the lead system administrator

• Deploy, upgrade, or maintain servers and systems

• Familiar with Linux operating systems in support of Tacacs+ and Syslog

• Works with task lead and ISSO to meet project deadlines 

• Active Directory, DHCP, DNS, and LDAP networking concepts

• Cabling, racking, and stacking equipment

• Works with Jira ticketing system

Basic Qualifications:

• Typically requires a Bachelor’s Degree and 4 OR an AA Degree and 6 years relevant experience OR 8 years of relevant experience in lieu of a degree

• Minimum five (5) years experience in systems administration of hardware and software in support of developing and testing of Information Technology systems

• Experience with external network communications such as NSANet

• Proficiency in working with applicable network devices to include repeaters, bridges, routers, gateways, and hubs

• Minimum five (5) years combined experience in administration of Microsoft Windows, Microsoft Windows NT, Unix, and Linux operating systems

• Minimum five (5) years experience with computer networking protocols including, but not limited to TCP, IP, UDP, HTTP, DHCP, and DNS

Preferred Qualifications:
•    MCSE

•    RedHat

•    CCNA and/or CCNP

Required Qualifications to meet DoD CWIP IAT II requirements (must have at least one or higher):

•    CCNA Security

•    CASP+ CE

•    CySA+

•    GICSP

•    GSEC

•    Security+ CE

•    CND

•    SSCP

Security Clearance Requirements:
•    TS/SCI clearance with Poly required

Physical Requirements:
•    Must be able to lift approximately 80 lbs.
•    Perform sedentary work
•    Must be able to rack and stack equipment
•    Must be able to bend and lift equipment

Our amazing benefits include:
•    Several Health Insurance plans to choose from, ManTech HSA contribution
•    20 days PTO plus 10 holidays
•    PTO sellback
•    PTO carryover of up to 240 hours
•    401k with match
•    Up to 4 weeks parental leave
•    Eligibility for annual program bonus
•    Training and conference opportunities and the industry’s leading cyber courses to include the Advanced Cyber Training Program (ACTP)
•    Tuition assistance (selected BS/MS programs are fully paid)
•    Very flexible schedule with compensation or flex hours for extra time worked
•    Employee referral bonuses

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