Network Administrator Job at Robert Half (St. Louis)

Network Administrator

We are seeking a skilled and experienced Network Administrator to oversee and ev...

Location

United States , Atlanta

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

3–7+ years of experience in network/system administration
Certifications: CCNA (required/preferred), CCNP, Security+
Experience with Azure/AWS cloud platforms
Knowledge of cybersecurity, IAM, SIEM, and vulnerability management
Experience with enterprise firewalls and hybrid environments

Job Responsibility

Manage enterprise networking (LAN/WAN, VPN, firewalls)
Support VDI (Citrix, VMware, Azure Virtual Desktop)
Perform cybersecurity assessments and remediation
Manage endpoint security (AV/EDR, encryption)
Conduct IT system mapping and risk assessments
Support eDiscovery and legal data preservation

What we offer

medical insurance
vision insurance
dental insurance
life insurance
disability insurance
401(k) plan

Fulltime

Network Administrator

We are seeking a knowledgeable Network Administrator to support and maintain our...

Location

United States , Delray Beach

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

3+ years of network administration or networking support experience
Strong knowledge of TCP/IP, routing, switching, VLANs, DNS, and DHCP
Experience with enterprise networking gear (Cisco, Meraki, Palo Alto, Fortinet, etc.)
Hands-on experience configuring firewalls, VPNs, and wireless systems
Understanding of network security best practices and monitoring tools
Ability to read and update network diagrams and documentation
Experience with tools such as Wireshark, NetFlow analyzers, or NMS platforms
Strong troubleshooting skills and ability to analyze packet-level issues
Excellent written and verbal communication skills
Ability to work independently or collaboratively on networking projects

Job Responsibility

Configure, monitor, and troubleshoot switches, routers, firewalls, and wireless access points
Support LAN/WAN environments including VLANs, VPNs, DHCP, DNS, and routing/switching
Monitor network performance, bandwidth usage, and system alerts
Assist with network upgrades, equipment refreshes, and site deployments
Maintain accurate network documentation including diagrams, IP schemas, and configurations
Troubleshoot network connectivity issues across wired and wireless environments
Manage firewall policies, VPN tunnels, ACLs, and network segmentation
Collaborate with security teams to implement network hardening measures
Support VoIP systems, WAN circuits, and remote connectivity
Escalate complex issues and coordinate with vendors when necessary

What we offer

medical
vision
dental
life and disability insurance
401(k) plan

Fulltime

Network Administrator

This position will provide daily operational support for network infrastructure,...

Location

United States , Arlington

Salary:

75000.00 - 82000.00 USD / Year

Innovative Management Concept

Expiration Date

Until further notice

Requirements

IAT Level II certification in ACTIVE status
U.S. Citizenship
Current DoD Secret clearance day one and prior to entry on duty, with the ability to pass an SSBI background investigation to up-scope their clearance to Top Secret
High school diploma or equivalent
At start date, must possess an IAT level II certification in ACTIVE status
DoD 8570/8140 compliant certification as required by the contract
Experience with: Supporting DoD or federal network environments
Using Forescout for network visibility, device identification, or access control support
Updating and maintaining network switches
SolarWinds network monitoring and alert review

Job Responsibility

Monitor, troubleshoot, and support enterprise network infrastructure within a DoD environment
Use SolarWinds to monitor network health, identify outages, review alerts, validate device status, and support network performance reporting
Support Cisco DNA Center/DNAC for network visibility, device management, troubleshooting, assurance, and operational monitoring
Use Forescout to support device visibility, endpoint identification, access control awareness, and network asset tracking
Update, configure, and maintain network switches, including firmware, IOS/software updates, configuration backups, and operational validation
Perform troubleshooting for network connectivity, VLANs, switch ports, routing issues, device reachability, and network performance problems
Support STIG compliance activities for network switches and Windows servers
Apply security hardening requirements in accordance with DoD STIGs, cybersecurity policies, and operational guidance
Maintain and update Windows servers, including patching, vulnerability remediation, security configuration, and system validation
Assist with vulnerability management, remediation tracking, scan review, and technical corrective actions

What we offer

401(k) with a 3% employer match
paid time off
paid holidays
FSA spending
dental
vision
health insurance
company-sponsored AD&D
life insurance
voluntary life

Fulltime

Network Administrator

Location

United States , Delray Beach

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

3+ years of network administration or networking support experience
Strong knowledge of TCP/IP, routing, switching, VLANs, DNS, and DHCP
Experience with enterprise networking gear (Cisco, Meraki, Palo Alto, Fortinet, etc.)
Hands-on experience configuring firewalls, VPNs, and wireless systems
Understanding of network security best practices and monitoring tools
Ability to read and update network diagrams and documentation
Experience with tools such as Wireshark, NetFlow analyzers, or NMS platforms
Strong troubleshooting skills and ability to analyze packet-level issues
Excellent written and verbal communication skills
Ability to work independently or collaboratively on networking projects

Job Responsibility

Configure, monitor, and troubleshoot switches, routers, firewalls, and wireless access points
Support LAN/WAN environments including VLANs, VPNs, DHCP, DNS, and routing/switching
Monitor network performance, bandwidth usage, and system alerts
Assist with network upgrades, equipment refreshes, and site deployments
Maintain accurate network documentation including diagrams, IP schemas, and configurations
Troubleshoot network connectivity issues across wired and wireless environments
Manage firewall policies, VPN tunnels, ACLs, and network segmentation
Collaborate with security teams to implement network hardening measures
Support VoIP systems, WAN circuits, and remote connectivity
Escalate complex issues and coordinate with vendors when necessary

What we offer

medical, vision, dental, and life and disability insurance
401(k) plan
free online training

Fulltime

Network Administrator

Location

United States , East Lansing

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Proven experience working as a Network Administrator or in a similar infrastructure support role
Hands-on knowledge of firewall technologies, including configuration, maintenance, and troubleshooting
Strong experience with Cisco routers and broader Cisco networking environments
Familiarity with Active Directory and its relationship to network access and administration
Working knowledge of LAN design, support, and performance optimization
Ability to identify technical issues quickly and implement effective network solutions
Strong documentation, communication, and organizational skills in a detail-focused IT setting

What we offer

medical
vision
dental
life and disability insurance
company 401(k) plan

Network Administrator

Robert Half is seeking a Contract Network Administrator to join our client's IT ...

Location

United States , Nashville

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Proven experience as a Network Administrator or in a similar role
Proficiency in network design, configuration, and troubleshooting
Strong knowledge of networking protocols and technologies (TCP/IP, VLANs, VPNs, etc.)
Experience with network security practices and tools
Familiarity with network monitoring and diagnostic tools
Excellent problem-solving and analytical skills
Strong communication and collaboration abilities

Job Responsibility

Network Design and Configuration: Design, deploy, and maintain network infrastructure, including routers, switches, firewalls, and wireless technologies, to ensure optimal performance and security
Network Monitoring and Optimization: Monitor network performance, troubleshoot issues, and implement optimizations to maximize network efficiency and reliability
Security Management: Implement and manage network security measures, including firewalls, intrusion detection systems, and VPNs, to protect against cybersecurity threats
Network Maintenance: Perform routine maintenance tasks, such as software updates, firmware upgrades, and hardware replacements, to ensure network stability
Troubleshooting and Support: Provide technical support and resolve network-related issues reported by users or identified through monitoring tools in a timely manner
Documentation: Maintain accurate documentation of network configurations, procedures, and changes for future reference and compliance purposes
Vendor Coordination: Collaborate with vendors and service providers to procure network equipment, manage service contracts, and troubleshoot complex network issues
Capacity Planning: Assess network capacity, anticipate growth requirements, and make recommendations for upgrades or changes to meet organizational needs

What we offer

Medical, vision, dental, and life and disability insurance
401(k) plan

Network Administrator

We are looking for an experienced Network Administrator to support a wholesale d...

Location

United States , Rancho Cordova

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

5+ years of experience in network administration within enterprise or multi-site environments
Strong hands-on expertise with Aruba EdgeConnect, including firewall configuration and Silver Peak-related technologies
Proven experience working with telecommunications carriers to provision, test, and support network circuits
Solid background in firewall technologies, LAN administration, and overall network troubleshooting
Working knowledge of Cisco networking and Cisco routers in a business-critical environment
Familiarity with Active Directory and its interaction with enterprise infrastructure services
Ability to work onsite in Rancho Cordova, California and become productive quickly in a fast-paced team setting

Job Responsibility

Oversee day-to-day administration of enterprise network infrastructure to ensure stable, secure, and efficient connectivity across offices and operational sites
Configure, deploy, and support Aruba EdgeConnect firewall solutions, including related orchestration and backend management activities
Coordinate with telecommunications providers to activate, validate, and troubleshoot carrier circuits for new and existing locations
Lead network refresh efforts by planning and executing switch replacement projects for remote branches and manufacturing facilities
Perform testing and verification of network changes to confirm services are fully operational before handoff or project completion
Support network improvements across a growing multi-site environment, including connectivity planning for numerous current and upcoming locations
Maintain and update network components within Aruba Central, including firmware management, endpoint-related support, and VLAN administration
Partner with internal stakeholders and external vendors to resolve infrastructure issues involving cameras, firewalls, and other connected systems
Contribute to operational processes tied to network change approvals and infrastructure documentation to support consistent service delivery

What we offer

medical
vision
dental
life and disability insurance
401(k) plan

Network Administrator

We are looking for a Network Administrator to support and strengthen a complex e...

Location

United States , Irving

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

At least 5 years of hands-on experience managing Cisco networking environments, including routers, switches, and firewalls
Minimum 3 years of experience working with SD-WAN technologies in an enterprise setting
At least 3 years of VoIP administration or support experience, preferably within Cisco-based voice environments
Solid knowledge of network architecture, LAN design, and security principles for enterprise infrastructure
Experience supporting hybrid cloud connectivity across cloud and on-premises systems
Proven ability to diagnose and resolve complex network and infrastructure issues with minimal supervision
Familiarity with related infrastructure technologies such as Active Directory, Windows Server services, VMware, Nutanix, or Microsoft 365
Cisco certifications or prior experience guiding projects or mentoring others would be considered an advantage

Job Responsibility

Architect, deploy, and refine Cisco network solutions spanning routing, switching, and firewall technologies to ensure dependable enterprise connectivity
Manage SD-WAN implementation efforts and continuously improve performance, resiliency, and overall network efficiency
Administer and support VoIP platforms, with an emphasis on maintaining stable voice services and addressing service disruptions promptly
Oversee highly available network operations across hybrid cloud environments, including platforms integrated with Azure and on-premises infrastructure
Work closely with cybersecurity stakeholders to apply network protection standards, strengthen access controls, and support compliance objectives
Investigate and resolve advanced infrastructure incidents affecting business-critical systems, using a methodical and service-focused approach
Execute lifecycle maintenance activities such as patching, hardware and software upgrades, and ongoing capacity or performance improvements
Participate in an on-call rotation to provide timely support for urgent infrastructure events in a fast-moving operational setting

What we offer

Medical, vision, dental, and life and disability insurance
401(k) plan
Free online training

Fulltime

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