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

New

System Administrator - Senior

Astrion is seeking an experienced SE-4 IT Systems Administrator to support end-u...

Location

United States , Eglin Air Force Base

Salary:

Not provided

Astrion

Expiration Date

Until further notice

Requirements

Master’s Degree and at least 10 years of relevant IT/Sys Ad experience. Additional experience may be substituted for education.
U.S. Citizenship
Active Secret clearance with the ability to obtain and maintain a Top Secret clearance.
Windows 11 Enterprise desktop environment administration.
Demonstrable experience managing complex Active Directory environments and maintaining Windows enterprise domains.
Microsoft 365 Productivity Suite deployment and troubleshooting.
Extensive experience in Air Force IT customer support functions.
Extensive experience with multiple Air Force networks user account creation and modification in Active Directory management tools.
Wide-ranging problem-solving skills across a wide variety of IT hardware items, networks, and software applications.
Comprehensive knowledge of the Air Force Network and responsibilities at all network management levels.

Job Responsibility

Perform hands on computer services and be responsible for building and imaging computers in support of the 96 CTG mission.
Respond to customer service requests and maintenance support.
Test, troubleshoot and apply corrections to information systems
and apply patches and perform software upgrades.
Assist with and manage the implementation and enforcement of all Air Force cybersecurity policies and procedures using Air Force guidance.
Accomplish cybersecurity incident monitoring and response.
Perform IT property management, hardware, and software configuration management.
Assist with and manage the implementation and enforcement of all Air Force cybersecurity policies and procedures using Air Force guidance.
Accomplish cybersecurity incident monitoring and response.
Perform IT property management, hardware, and software configuration management.

What we offer

Competitive salaries
Continuing education assistance
Professional development
Multiple healthcare benefits package options
401K with employer matching
Competitive time off policy along with a federally recognized holiday schedule

Fulltime

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 Engineer

Make an impact with NTT DATA Join a company that is pushing the boundaries of wh...

Location

Myanmar , Yangon

Salary:

Not provided

NTT DATA

Expiration Date

Until further notice

Requirements

Developing fundamental project and administration ability
Developing understanding and appreciation of technical design principles and compute layers
Ability to develop an understanding of fundamental project and administration processes
Display a strong learning orientation
Good verbal communication skills
Demonstrate a client service orientation
Hands-on proactive in approach
Bachelor's degree or equivalent in Information Technology or Computing or a related field
Professional level certification in different Networking technologies such as Cisco, Juniper, Aruba, F5, CCNP, JNCIP, ACMP etc
Moderate level of work experience in technical implementation engineering, specific to Networking technologies

Job Responsibility

Owns larger portions of an installation, break/fix incidents at a low to medium level of complexity during project lifecycle
Takes responsibility for problem resolution and troubleshooting during project lifecycle
Escalates complex problems to the relevant third parties
Assists with the documentation of standard operating procedures relating to installations and fixes during ops handover
Compiles and maintains project administration (Time Capture and feedback to stakeholders)
Conducts elementary presentations within the customer's organization
Expected to take leadership from senior resources on relevant technologies according to specialization and best practice
Performs any other related task as required

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

New

Senior Network Engineer

We are working with a company that are internationally recognised in what they d...

Location

United Kingdom

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

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