Senior Network Administrator Job at Robert Half (Jacksonville)

Senior Network Administrator

We are looking for an experienced Senior Network Administrator to support and en...

Location

United States , Portland

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Demonstrated experience in network administration within complex enterprise environments
Strong hands-on expertise with Cisco routers, Cisco networking, and firewall technologies
Proven ability to manage and support Fortinet firewalls in a production setting
Working knowledge of LAN, WAN, and SD-WAN design, support, and troubleshooting
Experience with Microsoft Azure networking concepts and hybrid infrastructure connectivity
Background in system administration, including support for Active Directory environments
Ability to diagnose technical issues efficiently and communicate solutions clearly with stakeholders

Job Responsibility

Oversee the stability, performance, and security of LAN and WAN infrastructure across the organization
Configure, maintain, and troubleshoot Cisco routers and broader Cisco networking components to ensure dependable connectivity
Administer Fortinet firewall solutions, including policy updates, access controls, and threat protection measures
Support SD-WAN operations by monitoring links, optimizing traffic flow, and resolving connectivity issues between sites and services
Manage Active Directory and related system administration tasks that support network access and user connectivity
Collaborate with internal teams to address network incidents, implement improvements, and reduce service disruptions
Assist with Azure-connected networking components and help maintain secure integration between cloud and on-premises environments
Document network configurations, operational procedures, and technical changes to support ongoing maintenance and compliance

What we offer

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

Senior Infrastructure & Network Administrator

The company is a global leader in telecommunications, specializing in advanced c...

Location

France , Paris

Salary:

Not provided

Feel IT Services

Expiration Date

Until further notice

Requirements

Strong hands-on experience with networking concepts (TCP/IP, routing, NAT, VPNs, firewalls)
Solid experience working with Linux in production environments
Experience administering Windows Server environments
Experience with VMware or similar virtualization platforms
Experience with backup and disaster recovery solutions
Proven ability to troubleshoot complex issues under pressure
Basic understanding of database administration concepts
Experience supporting workstation environments and end-user systems
Strong analytical and problem-solving skills
Experience in telecom / ISP / high-availability environments is a strong advantage

Job Responsibility

Operate, maintain, and troubleshoot complex network infrastructure (routing, VPNs, firewalls, traffic flows)
Manage and optimize Linux-based systems in a production environment
Administer and maintain Windows Server environments and related services
Manage and support VMware virtualization infrastructure
Maintain backup and recovery systems, ensuring successful backup and restore procedures
Investigate and resolve critical incidents, ensuring minimal service disruption
Monitor system performance, analyze network behavior, and proactively prevent issues
Perform basic administration and troubleshooting of database systems
Support and maintain workstation environments when required
Implement and maintain security best practices across network and systems

What we offer

Competitive salary based on experience
Supportive working climate with flexible work practices
Lunch tickets
Coffee, fruits and other goodies at the office))
Access to largest network of gyms
Company-sponsored events
Travelling opportunities in some project areas
Career development opportunities (certifications / trainings / conferences)
Feel IT referral bonus

Fulltime

Senior Systems and Network Administrator

This is a newly created role to support a growing pipeline of infrastructure pro...

Location

United States , Providence

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

Multi‑site Active Directory administration
AD replication health and troubleshooting
Group Policy, Certificate Authority, file services
AD to Entra ID sync (Entra Connect / AAD Connect)
Patch management, OS upgrades, server rebuilds
Exposure to Microsoft Azure (infrastructure, backup, DR concepts)
Microsoft 365 administration: Entra ID (Azure AD), Exchange Online, SharePoint Online, Teams
Strong Layer 2/3 networking fundamentals
DHCP, DNS administration
Firewall experience (Meraki preferred): Rules, traffic flows, site‑to‑site and client VPNs

Job Responsibility

Lead and support infrastructure modernization projects (server, network, cloud)
Maintain and improve on‑prem and hybrid environments
Act as a senior escalation point for Windows, AD, and networking issues
Support an Azure migration in partnership with an MSP and manage the environment post‑implementation
Assist with VMware decommissioning (planned for late Q3/Q4)
Participate in after‑hours support as needed
Mentor team members and assist with lower‑level support when required

What we offer

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

Senior Network and Systems Administrator

Delta Solutions & Strategies is seeking a Senior Network and Systems Administrat...

Location

United States , MacDill AFB, FL

Salary:

Not provided

Delta Solutions & Strategies

Expiration Date

Until further notice

Requirements

7 years of experience in design and maintenance/support of network and its users to include all servers, thick and thin clients, network storage devices, and hubs
network hardware support and security
3 years of experience (can be concurrent with the 7 years above) with administering military LAN systems
Baseline and Privileged Use Certified Information Assurance Technical (IAT) Level I
IAT Level II must be obtained within 6 months of start date
Must possess a working knowledge of DISA Authority to Operate certification procedures and Emass
Active Secret Clearance required upgradable to Top Secret within 4 months and eligible for SCI access and ACCM read-in

Job Responsibility

Perform duties as Baseline and Privileged Use Certified Information Assurance Technical (IAT) Level II in accordance with DoD 8570.01-M, DOD Instruction 8140.01, USSOCOM Manual 380-3, and the SIE OPORD
Maintain, enhance, and manage Information Technology and standalone secret local area network (LAN)
Provide on-site facilities management to manage and operate J8-S automated data processing systems
Implement and maintain access and security control of J8-S LAN
Setup and configuration of network servers, implement back/recovery methodologies, add and remove users, and maintain security permissions
Installation of operating system software on servers and desktops, update software patches and release upgrades
Performs all aspects of Information Assurance - maintain LAN certification and accreditation for Secret and ACCM material
Make changes as required to each server and desktop system to meet DISA Security Technical Implementation Guides
Ensure Authority to Operate for LAN is maintained and current
Troubleshoot and remedy system problems and outages

What we offer

medical
dental
vision
life insurance
401(k)
PTO
paid holidays
parental
military
and jury duty paid leaves

Fulltime

New

IP Network Senior Engineer

At Vodafone, we’re not just shaping the future of connectivity for our customers...

Location

Greece , Athens

Salary:

Not provided

Vodafone

Expiration Date

Until further notice

Requirements

BSc degree and at least 5 years work experience in an IT / network organization supporting large heterogeneous IP infrastructures
R&S CCNP or CCNA certifications strongly recommended
Knowledge in Cisco ACI strongly recommended
Goal-oriented and enjoy taking initiative as well as responsibility
Experiences in project management
Fluent English oral and written
Expert Knowledge in networks (TCP/IP, Protocols, Structures, Hardware, Security)
Expert Knowledge in the area of the installation and configuration of network components (Routers, Switches, VPN Gateways, Firewalls, Proxies and others)
Expert Knowledge in routing protocols, VOIP technology, WLAN technology, DHCP, DNS, AD
Expert Knowledge in network management and network analysis

Job Responsibility

Be responsible for High Level and Low Level Design engineering and network design optimization
Drive increased quality of our network end to end
Provide HLDs, LLDs, define templates, modularize, and industrialize configuration items and their implementation
Deploy the network fit for purpose including understanding of how our services/applications layer will run across the network (capacity, capability, utilization)
Implement segregation concepts
Conduct proof of concept (POC) validation
Be responsible for optimal implementation process that delivers ensured quality
Decrease the design and implementation costs and achieve a harmonized & simplified network infrastructure
Take control over CAPEX budget for the projects including forecast, planning, allocation, approval process, administration
Deployment of the validated solution to its operational environment

What we offer

Award-winning work environment -certified #1 Top Employer in Greece
Competitive pay, bonus & remuneration package
Private Health & Medical Insurance
Hybrid way of working: a blend of remote and office-based working, including the option to work from abroad
Unlimited access to learning resources and trainings
Vodafone Parental Leave: 16 weeks of fully paid parental leave to all employees regardless of gender, sexual orientation or length of service
Spirit of Vodafone Day: one day each quarter dedicated to your personal development
Extra days off: Vodafone Day, Family Day, Volunteering Day
Office amenities (subject to the office location): such as restaurant, beauty corner, gym and parking
Special employee offers and discounts

Fulltime

Senior Network Account Manager

The Senior Account Manager is committed to the development and supervision of a ...

Location

United States , New York

Salary:

105100.00 - 188020.00 USD / Year

Healthfirst

Expiration Date

Until further notice

Requirements

Medicare and/or Medicaid managed care experience
Provider office operations experience
Ability to understand provider claims reimbursement
Contract negotiation experience
Professional writing skills (Letter writing, Memo and Email)

Job Responsibility

Advance Healthfirst through superior customer service focused leadership in an assigned territory and team, which will help to optimize provider satisfaction
Educate and train network representatives in key business principles around profitability, network adequacy, quality, etc.
Promote successful internal collaboration within Healthfirst for our providers
Manage projects
Provides coaching/mentoring for staff
Identifies improvement for further training/education
Critical thinking that solves problems with a logical, analytical discipline with a view on how decisions may impact provider/practice operations
Understanding of various reimbursement methodologies as it relates to the community provider network
Strong grounding of core principles and the role of hospitals within both Clinical Efficiency, Population Health, and Administrative Efficiency
Proactively identify trends of issues, root causes and their magnitude, develop and implement action plans to closure

What we offer

medical, dental and vision coverage
incentive and recognition programs
life insurance
401k contributions

Fulltime

Senior Network Engineer

Location

United Kingdom , London

Salary:

60000.00 - 80000.00 GBP / Year

PLANET RECRUITMENT SERVICES LTD

Expiration Date

Until further notice

Requirements

Bachelor's degree in Computer Science, Information Technology, or equivalent experience
6+ years of experience in network administration or engineering
Strong knowledge of routing, switching, TCP/IP, DNS, DHCP, and VPN technologies
Hands-on experience with firewalls, load balancers, and monitoring tools
Familiarity with cloud networking (AWS)
Relevant certifications (CCNA, CCNP, or equivalent) preferred
Problem-solving mindset with strong communication skills and collaborative approach

Job Responsibility

Operations & Support: Monitor, troubleshoot, and maintain network hardware, software, and connections to ensure optimal performance
Implementation: Configure and deploy switches, routers, firewalls, VPNs, and load balancers in line with architecture standards
Collaboration: Work with architects, security, and cloud teams to implement integrated, secure, and scalable solutions
Optimization: Identify and resolve network bottlenecks, enhance efficiency, and ensure high availability
Documentation: Maintain detailed network diagrams, runbooks, and configuration standards
Security & Compliance: Support enforcement of security protocols, patch management, and compliance with global frameworks
Continuous Improvement: Stay current on emerging technologies and recommend enhancements to network design and operations

Fulltime

Senior Network Engineer DNS DHCP IPAM DDI Engineering

Wells Fargo is seeking a highly skilled DDI Engineer with deep enterprise experi...

Location

United States , Columbus; Chandler; Charlotte; Irving; McLean; Minneapolis

Salary:

100000.00 - 196000.00 USD / Year

Wells Fargo

Expiration Date

July 19, 2026

Requirements

4+ years of Network Engineering experience, or equivalent demonstrated through one or a combination of the following: work experience, training, military experience, education
2+ years' experience with DNS, DHCP, IP Address Management (IPAM), and Network Time Protocol (NTP) systems, including architecture, deployment, and lifecycle management
Military experience with developing and scaling automated infrastructure and workflows in hybrid or tactical environment
Military experience designing and implementing secure, mission-critical automation solutions within defense or government environment
Must have Experience working with Enterprise DDI Platforms Such as Bluecat or Infoblox
Experience designing and implementing scalable, resilient infrastructure solutions for core network services
Advanced scripting skills (e.g., Python, Bash, PowerShell) for automation of log rotation, data collection, error handling, and alerting
Hands-on experience with synthetic transaction development for proactive monitoring of infrastructure and applications
Experience mentoring and guiding less experienced staff
Experience with DevOps and CI/CD automated build and deployment processes

Job Responsibility

Lead or participate in implementing network security policies across routers and firewalls
Manage production networks including Internet Protocol backbone, data centers and edge pops across the globe
Ensure the continuous availability of all data network services
Identify gaps, risks and issues and navigate organizational structure to resolve them
Perform quarterly proactive network testing to ensure proper functioning and reliability of the network
Investigate and remediate network capacity related issues
Apply knowledge of security and regulatory policies to design and implement foolproof secured network solutions
Provide resolution information and work with other teams to complete impact analysis
Deliver comprehensive and maintenance plans for change management review and approval
Partner cross-functionally with other Product Infrastructure teams in order to continuously improve and apply standards and policies relevant to operational excellence

What we offer

Health benefits
401(k) Plan
Paid time off
Disability benefits
Life insurance
Critical illness insurance
Accident insurance
Parental leave
Critical caregiving leave
Discounts and savings

Fulltime

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Senior Network Administrator

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