Network Security Administrator Job at Robert Half (Exton)

IT Systems, Network, & Security Administrator

We’re seeking a IT Systems, Network, & Security Administrator for a project-base...

Location

United States , Los Angeles

Salary:

Not provided

Tech Holding

Expiration Date

Until further notice

Requirements

Bachelor’s degree from an accredited university in Business, Technology, or a related field required
At least 3 years of experience in an IT Systems Admin, Security Admin, or Senior IT Support role
Prior experience with cloud-based email security software, preferably Mimecast
Experience with mobile device management (MDM), preferably Microsoft Intune and/or Kandji
Strong knowledge of Microsoft 365 administration and Entra ID
Prior experience troubleshooting identity, access, and MFA-related issues
Solid understanding of email security concepts such as phishing, spoofing, DMARC, DKIM, and SPF
Comfortable supporting a mixed Windows and macOS environment
Ability to work in an unstructured, fast-paced environment while making sound judgment calls in security and user access scenarios
Must have a valid driver’s license and a reliable and fully insured vehicle as this role will be traveling throughout Los Angeles to support staff at LAFC Headquarters, BMO Stadium, and the LAFC Performance Center at California State University – Los Angeles

Job Responsibility

Administer and support the organization’s cloud-based email security platform, Mimecast, for issues relating to threat investigation, message tracing, and policy management
Monitor and respond to phishing, spoofing, and impersonation attempts
Perform physical network troubleshooting, including identifying cabling faults, checking patch panels, validating link lights, and ensuring proper switch/AP connectivity
Support the organization’s cloud-based identity and access management platform, Okta, day-to-day operations regarding user access, SSO access to internal and SaaS applications, and multi-factor authorization (MFA) issue resolution
Manage and monitor the organization's mobile device management (MDM) platforms, Microsoft Intune and Kandji, troubleshooting MDM enrollment issues, profile errors, and missing agents
Provide support and troubleshoot device compliance, deployment, and access issues for Windows and macOS devices
Oversee user account management in Microsoft 365, Entra ID, and Active Directory
Support employee onboarding and offboarding, including user provisioning, device setup, and access changes
Provide Tier 1–3 helpdesk support, including MFA, password resets, access issues, and escalation handling
Review and triage security alerts in Microsoft Defender and Entra ID

Network Administrator

We are looking for an experienced Network Administrator to join our team in Napl...

Location

United States , Naples

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Proficiency in firewall technologies and Checkpoint Firewall systems
Hands-on experience with Cisco routers and networking
Strong knowledge of Active Directory administration
Familiarity with LAN (Local Area Network) concepts and configurations
Understanding of Border Gateway Protocol (BGP) for network routing
Ability to conduct security assessments and implement risk mitigation strategies
Experience with monitoring and analyzing security logs and alerts
Excellent communication skills for delivering security updates and collaborating with technical teams

Job Responsibility

Collaborate with the Network Engineer and IT Director to establish and maintain security protocols, risk assessments, and documentation procedures
Monitor and analyze data logs and security alerts, including data loss protection and data movement, escalating issues as needed
Communicate critical security updates and activities to relevant personnel through clear and timely messaging
Research emerging security technologies to identify opportunities for enhancing system performance and protection
Participate in technical audits to verify compliance with established security policies and industry standards
Investigate and perform root-cause analysis on security-related incidents, implementing preventive measures to mitigate future risks
Update controls and procedures based on incident findings to strengthen the organization's security posture

What we offer

Medical insurance
Vision insurance
Dental insurance
Life insurance
Disability insurance
401(k) plan enrollment
Access to free online training

Fulltime

Network Administrator

Location: Hybrid-Remote. The role will require travel, as needed to project loca...

Location

United States , Alexandria

Salary:

Not provided

Sparibis

Expiration Date

Until further notice

Requirements

Must be able to obtain and maintain a Public Trust security clearance
7+ years of professional experience in network administration
Bachelor’s degree in information technology or related field or equivalent professional experience
Experience overseeing the deployment, configuration, and support of Cisco network infrastructure including devices
Experience installing, configuring, and maintaining Cisco network devices, including routers, switches, and firewalls
Experience with network cabling installation and management, including copper and fiber
Experience monitoring and optimizing the performance of the network
Excellent written and verbal communication skills
Must be detail oriented
Customer service oriented

Job Responsibility

Installing, configuring, and maintaining Cisco network devices, including routers, switches, and firewalls
Networking cabling installation and management, including copper and fiber
Monitoring and optimizing the performance of the network, ensuring efficient resource allocation and minimal downtime
Diagnosing and resolving network issues, including connectivity, performance, and security problems
Ensuring the security of the network by applying patches, updates, and security configurations to Cisco devices and Cloud network configurations
Maintaining detailed documentation of network configurations, procedures, and policies
Working closely with other IT teams to support network needs and integrate network solutions with other systems
Responding to network alerts and resolving network infrastructure problems
Providing configuration management components to include configuration documentation and network diagrams
Providing technical support on existing and emerging technologies, planning and execution of technology projects, execution of technology related tasks and initiatives

Network Administrator

As a Network Administrator, you'll be tasked with providing technical support fo...

Location

United States , Washington, District of Columbia

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or a related field
equivalent certifications or experience may be accepted in place of a degree
1–2 years of experience in network administration or IT support, with hands-on exposure to network monitoring tools and technologies
basic experience with network monitoring tools such as Nagios and Splunk
familiarity with Cisco Prime for device monitoring and management
understanding of Cisco Identity Services Engine (ISE) for network access control and security policies
strong knowledge of network protocols (e.g., TCP/IP, DNS, DHCP, SNMP, HTTP)
solid understanding of network security tools and best practices
ability to diagnose and troubleshoot basic network issues, escalating complex problems to senior engineers as required
excellent verbal and written communication skills, with the ability to collaborate across IT teams and create detailed documentation

Job Responsibility

Monitor the performance and availability of network devices using tools such as Nagios and Splunk
respond to network alerts, investigate issues, and escalate them to senior engineers for resolution as necessary
troubleshoot network connectivity and device performance issues to ensure prompt resolution
support the administration of Cisco Prime for device monitoring and management
assist in configuring and maintaining network device settings using Cisco Prime
generate performance reports and device health summaries using Cisco Prime tools
help configure and maintain Cisco Identity Services Engine (ISE) for network access control, security policies, and guest-management settings
support the enforcement of network security segmentation and policies to ensure a safe operating environment
perform basic network security tasks like firmware upgrades, patch management, and configuration backups
document network configurations, infrastructure changes, and troubleshooting steps for internal record-keeping

What we offer

Medical insurance
vision insurance
dental insurance
life and disability insurance
eligibility to enroll in company 401(k) plan
free online training

Fulltime

Network Administrator

We are offering an exciting opportunity in the Wholesale Distribution industry, ...

Location

United States , South Plainfield, NJ

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Deep understanding of Firewall Technologies
Proficiency in Fortinet Firewalls
Demonstrable expertise in using FortiManager
Practical knowledge and experience with FortiAnalyzer
Familiarity with FortiGate
Certification in Cisco CCNA is highly desirable
Cisco CCNP qualification will be a significant advantage

Job Responsibility

Overseeing network security
Handling network performance issues
Implementing network security controls
Managing site-to-site VPNs
Installation, configuration, and maintenance of DBMS
Conducting regular database backups, recovery, and maintenance
Monitoring database performance and optimizing queries
Implementing and overseeing database security measures
Troubleshooting database-related issues
Participating in Help Desk Operations

What we offer

Medical, vision, dental, and life and disability insurance
Eligibility to enroll in company 401(k) plan

Fulltime

Network Administrator

We are seeking an experienced and detail-oriented Network Administrator to manag...

Location

United States , Delray Beach

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Proven experience as a Network Administrator or similar role
Strong knowledge of TCP/IP protocols and network services
Experience with network monitoring tools and techniques
Proficiency in route switching and configuring routers and switches
Familiarity with network security practices and protocols
Excellent problem-solving skills and attention to detail
Strong communication and interpersonal skills
Ability to work independently and as part of a team
Relevant certifications (e.g., Cisco CCNA, CompTIA Network+) are a plus.

Job Responsibility

Design, configure, and manage network infrastructure, including routers, switches, and firewalls
Monitor network performance and troubleshoot issues to ensure optimal operation and minimal downtime
Implement and manage TCP/IP network configurations and services
Conduct regular network performance tuning and capacity planning
Develop and enforce network policies and procedures to ensure security and reliability
Monitor network traffic, identify bottlenecks, and optimize network performance
Maintain accurate network documentation and inventory records
Collaborate with the IT team to support and integrate network solutions
Respond to and resolve network-related incidents and service requests
Stay updated with the latest industry trends and best practices in network administration.

What we offer

Medical insurance
Vision insurance
Dental insurance
Life and disability insurance
Eligibility to enroll in 401(k) plan
Access to free online training.

Fulltime

Network and Security Engineer

We are seeking a talented and experienced Network and Security Engineer to join ...

Location

United Kingdom , London

Salary:

Not provided

AWTG

Expiration Date

Until further notice

Requirements

Bachelor’s degree in computer science, Information Security, or a related field (or equivalent work experience)
Proven experience as a Network and Security Engineer or similar role, with focus on IP network design, implementation, T-shoot and mobile network security
Understanding of 3GPP mobile network CORE and RAN architectures and security requirements
Strong knowledge of network security protocols, VPN, firewall management, and intrusion detection systems
Experience with security tools such as SIEM, IDS/IPS, and vulnerability scanners
Familiarity with regulatory standards and frameworks (e.g., GDPR, HIPAA, ISO 27001)
In-depth understanding of routers, switches, firewalls, and switching/routing protocols – such as VLAN, VTP, STP, RSTP, MST, OSPF, EIGRP and BGP
Monitoring solutions which include PRTG, SolarWinds and Zabbix, and also, knowledge of Virtualization technology such as EXSi, KVM, Proxmox and Hyper-V
Excellent analytical and problem-solving skills with the ability to troubleshoot complex issues
Strong communication skills and the ability to work effectively in a team environment

Job Responsibility

Design, configure and implement highly scalable L2/L3 networks using varieties of protocols and vendor equipment
Monitor network traffic and analyse security incidents to detect and respond to threats within mobile network environments
Diagnose and troubleshoot network related issues associated with L1-L7 using varieties of tools, ensuring quick recovery and minimum network downtime
Carry out periodic backups of network device operating system and configurations to ensure timely restoration of critical network services
Design and implement network security solutions such as Policies, IPS, SSLVPN, IPSec VPN and security profiles using Next-Gen Firewalls (FortiGate/Palo-Alto)
Develop and apply network segmentation strategies to strengthen security and safeguard sensitive information within the core network
Work closely with other teams to establish and enforce network access policies, ensuring that only authorized individuals and devices have the correct access privileges
Conduct vulnerability assessments and penetration testing to identify and address security weaknesses in mobile network architectures
Develop and enforce security policies and procedures to ensure compliance with industry standards and regulations
Design and implement security protocols and solutions to protect network infrastructure

Fulltime

Network Administrator

This role creates trust by consulting business for IT services and solutions in ...

Location

Romania , Bucharest

Salary:

Not provided

Inetum

Expiration Date

Until further notice

Requirements

Minimum 5 years of professional experience as Network Administrator
Expert in Network Systems (CISCO) including Network Security
Professional in Wireless Network, Local Network, Internet connectivity, Proxy (Z-Scaler), WAN connectivity (MPLS, Site-2-Site), Firewalls (Cisco)
Professional in tools PRTG, SolarWinds, Wireshark, Radius etc.
Professional in DHCP, DNS server’s configuration
Professional in VPN solutions (CISCO and Palo Alto) on both sides (end-user and backend side)
Professional in network architectures and topologies (SD WAN, WAN/LAN, HUB-SPOKE)
Hands-on experience in management network devices at enterprise scale (min. 500 network devices like: routers, switches, access points, etc.)
Good communication skills

Job Responsibility

Manage, monitor and maintain network configuration at scale (approx. 1000 network devices)
Investigate/troubleshooting and solve network configuration issues
Manage wire and wireless networks
Support end users in network issues mainly with VPN connection and traffic

What we offer

Full access to foreign language learning platform
Personalized access to tech learning platforms
Tailored workshops and trainings to sustain your growth
Medical subscription
Meal tickets
Monthly budget to allocate on flexible benefit platform
Access to 7 Card services
Wellbeing activities and gatherings

Fulltime

Network Security Administrator

Robert Half

Location:
United States , Exton

Category:
IT - Administration

Contract Type:
Not provided

Salary:

Job Description:

Job Responsibility:

Requirements:

Additional Information:

Job Posted:
March 01, 2026

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