9,794 IT Administrator jobs in the United States

• Administer Microsoft Azure environments at FedRAMP High/IL5 levels, focusing on stability, access, and security.
• Manage all identity and access controls using Azure Entra Identity Manager within FedRAMP boundaries.
• Provision and deprovision users/accounts, ensuring adherence to least-privilege and compliance best practices.
• Implement and support FedRAMP-mandated controls and procedures around privileged access, onboarding/offboarding, and user credentials.
• Perform regular audit and compliance reviews; remediate findings/violations as required.
• Generate and maintain artifacts/documentation to support ongoing FedRAMP compliance and annual assessments.
• Support incident response processes, including evidence collection and root cause analysis.
• Collaborate with internal security, compliance, and technical teams.

• Serve as primary IT point of contact for Long Island-based executive leadership.
• Provide hands-on support, maintenance, and troubleshooting for AV conference room systems, office networking, and productivity tools (Microsoft Office, Teams, etc).
• Coordinate with vendors for office IT issues and ensure uptime of office conferencing solutions and networks.
• Manage and track inventory of IT assets at the Long Island site.
• Provide rapid-response troubleshooting and issue resolution.

• US Citizenship required.
• Bachelor's degree in Information Technology, Computer Science, or related field (or equivalent experience).
• 3+ years of systems administration experience in a cloud environment, with FedRAMP experience highly preferred.
• 2+ years experience administering Microsoft Azure, including security and identity tools.
• Demonstrated expertise with Azure Entra (formerly Azure Active Directory) and identity lifecycle management.
• Strong understanding of FedRAMP or NIST 800-53 frameworks and compliance requirements.
• Demonstrated experience generating or maintaining FedRAMP/NIST traceability matrices, audit artifacts, etc.
• Experience providing in-person IT support, including AV/conference room technology and basic office networking.
• Strong customer-service skills for executive/VIP support.
• Ability to facilitate and/or pass background screening to support FedRAMP clearance requirements.

• Relevant certifications (e.g., Azure Administrator Associate, CISSP, Security+, etc.).
• Prior experience in a government, defense, or highly regulated environment.
• Experience with mobile device management (MDM) and endpoint security.
• Strong technical documentation and communication skills.

• Ability to lift/move office technology (up to 25 lbs) and perform on-site troubleshooting.

• Rack, Build, cable, configure, and provision Client and AMD Servers
• Rac, Cable, and Deploy Cisco layer 2 networking equipment
• Troubleshoot, test, quality assurance of Server hardware
• Professionally resolve hardware issues via trouble ticket
• Desired experience: Operating System Installation
• Windows Server, Linux, Uni, Cabling knowledge beyond dressing or running cabling, such as confidently comprehending port mapping and ability to know the differences and purposes behind each cable type
• Understanding of basic hardware troubleshooting and applying logical methods of resolution
• Web Server and Database installation experience a plus
• Must be able to work in this country without sponsorship
• Must be willing to learn quickly, multitask, and work in a fast-paced environment
• Technical Experience: Should know basic computer Hardware asset knowledge
• Ability to connect/configure desktop/laptop/tablet PC peripherals according to test plan requirements ( e.g. external monitors, keyboard, mouse, Bluetooth headset, doc, etc. )
• Software Installation, Updates: Ability to install an Operating system, BIOS, driver updates and identify version information
• Basic PC issue triage: Ability to identify common OC issues ( e.g. , blue screens, hangs, etc. ) and work with issue tracking systems to record issues, search for other instances of similar failure mechanism, and apply workarounds ( e.g. load specific driver version, apply OS update.Test Plan execution and Optimization for efficiency
• Ability to read a test plan definition and optimize test execution ( e.g., peripheral configurations and required changes, operator time for deploying required software updates, charging/discharging time for battery life tests, consider run time of specific applications/measurements, etc. )
• Ability to execute a manual test plan script ( e.g. boot system, run a batch file, open chrome/browse website list ) and report subjective user experience criteria ( e.g. perceived fan noise, system touch temperature, snappy vs sluggish responsiveness )
• Leadership Capabilities: Engages well with customers and partners while navigating through the potential roadblocks.
• Effective with executive communication and building respect
• Works cross-functionally across groups to quickly resolve issues that arise from testing
• Education and Experience: Electronics and Experience ( 2 years degree )required or 3 to 5 yrs of relevant industry experience
• Prior experience with client PC testing, diagnostic and debug preferred?
• Prior experience with testing tools and environments, defect tracking and revision control? Prior experience using and managing tasks through a
• MVS System Administration

• Current Location with Zip Code:
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• Employer details(Email Id & Phone no.):

The network administrator is responsible for maintaining the networks and systems that keep our organization running. From maintaining ironclad security to supervising network updates and training users, the administrator is not only IT support but also the thread that connects all operations. Deep technological expertise with a wide range of computer systems, hardware, and software is essential for the network administrator to excel in this role and help drive our organization forward.

• Assist in network design, implementation, and maintenance
• Provide network support across organizational operating systems
• Maintain stable and consistent connectivity across all network computers
• Prepare, implement, and monitor disaster procedures and recovery

• Maintain network servers and associated hardware, software, services, and settings
• Recommend, test, and implement system and security upgrades
• Consistently monitor and troubleshoot network stability and performance
• Create, adjust, and maintain network user settings and permissions
• Write technical support documentation for network systems and applications

• Two or more years of experience in a network administration role
• Comprehensive knowledge of networking concepts and computing infrastructures
• Proven skills in network engineering, operations, and performance analysis
• Experience with leading server management and monitoring tools
• Strong communication skills for training and assisting users

• Bachelor’s degree (or equivalent) in computer science or related field
• Experience with Microsoft Windows Server 2008 and forward
• Experience with Cisco switches and routers
• Professional certification, such as CISSP, CCNA, or CCNP

We are looking for an efficient, reliable Network Administrator to join our network operations team. You will monitor our systems to ensure the network is consistently available to all of our staff and troubleshoot any issues that may cause a disruption in service. Security is of the utmost importance, so you will install and monitor effective security measures to keep all of our company data safe. We prefer candidates who have at least two years of network administration experience.

• Manage day-to-day IT infrastructure
• Monitor networking equipment and servers
• Oversee troubleshooting for system errors
• Ensure security for web users' accounts and information
• Provide helpdesk support for network issues and respond to requests for IT support
• Evaluate connectivity issues, equipment, and software
• Set up equipment for new users
• Perform data backups
• Install and update network system improvements as needed
• Keep an inventory of equipment, software, and licenses

• High school degree or equivalent; associate or bachelor's degree in related field preferred
• MCSE or MCITP certification required
• 2+ years of relevant network and server management support
• Experience with helpdesk or IT support
• Familiarity with any of the following: Cisco products, Network Monitoring Tools, Distributed Antenna System, Windows Domain, Active Directory, DNS, Telnet, DHCP, TACACS+ & RADIUS, Microsoft Active Directory, Microsoft Member Servers, Kerio Email, Synology NAS Storage environment

Mantech seeks a motivated, career and customer-oriented Network Administrator , to join our team in San Antonio, TX . 

The team delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of our Nation

Responsibilities Included but are not limited to:

• Responsible for supporting customer networks involving cross-domain solutions, including VPNs, one-way data transfers, unclassified mission related infrastructures, and Taclane 175 encryption devices.  Specific configurations include routing using MPLS/VPLS, OSPF, EIGRP at the Core and Distribution devices and switching at the Access devices.
• Responsible for performing planning, deployment and quality assurance functions for system and network upgrade projects.
• Will develop high, mid and lower-level diagrams and schematics to document the system and network infrastructure for planning, historical and continuity purposes.
• Responsible for designing, installing, configuring, troubleshooting and maintaining a LAN/WAN equipment required to provide telecommunications services in a complex environment consisting of various Cisco network equipment to include Nexus and Catalyst model as well as Integrated Service Routers.
• Responsible for designing networks utilizing switching technology to include VLAN, Inter-VLAN routing, trunking, and port aggregation on the WAN/LAN environment.

 Minimum Qualifications:

• Bachelor’s degree with 12+ years of relevant experience OR associates degree with 15 years OR high school diploma with 20 years of relevant experience
• Experience configuring and troubleshooting Cisco catalyst switches
• Experience configuring and troubleshooting Cisco ASR routers
• 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:

• Experience with supporting cross-domain customer networks (VPNs, one-way data transfers, unclassified infra, Taclane 175), with expertise in Core/Distribution routing (MPLS/VPLS, OSPF, EIGRP) and Access switching.
• Experience with Linux network troubleshooting

Clearance Requirements:

• Must have a current/active TS/SCI w/ Polygraph.   

Physical Requirements:  

• Bending, carrying, kneeling, lifting, light work up to 20 lbs., reaching, repetitive motions, sedentary work, walking, working with data, ability to handle stress & work under pressure, ability to use MS Office, ability to use a PC, analytical or critical thinking skills, interpersonal & people skills, leadership skills, listening skills, multi-tasking ability, oral & written communication skills, organizational skills.

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 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. This position is part of the Enterprise Infrastructure Services (EIS) organization—responsible for MPO’s Enterprise Information Technology (EIT), the backbone platform supporting all enterprise users. You will work with customers, Integrated Product Teams (IPTs), and vendors to deliver secure and reliable network services across Data Center & Compute environments.

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 and Twelve (12) years of experience as a Network Administrator supporting programs and contracts of similar scope, type, and complexity. In lieu of a Bachelor’s degree, three (3) years of additional Network Administration experience with an Associates degree may be substituted OR eight (8) years of additional experience and a High School Diploma
• 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 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. This position is part of the Enterprise Infrastructure Services (EIS) organization—responsible for MPO’s Enterprise Information Technology (EIT), the backbone platform supporting all enterprise users. You will work with customers, Integrated Product Teams (IPTs), and vendors to deliver secure and reliable network services across Data Center & Compute environments.

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 and Twelve (12) years of experience as a Network Administrator supporting programs and contracts of similar scope, type, and complexity. In lieu of a Bachelor’s degree, three (3) years of additional Network Administration experience with an Associates degree may be substituted OR eight (8) years of additional experience and a High School Diploma
• 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 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.