Network Engineer - Optical (DWDM)

Telecom Field Engineer - SONET / TDM / DWDM

Added 17/09/2026

Position OverviewWe are seeking a Telecom Field Engineer with hands-on experience supporting carrier transport networks in the field.This position supports a broad mix of legacy and modern transport technologies, with a particular need for candidates who still understand TDM and SONET infrastructure, including:DS0 | DS1/T1 | DS3/T3 | OC-3 | OC-12 | OC-48 | OC-192 | Ethernet | IP | Wavelength | DWDMThis is a highly hands-on role requiring regular travel between telecom sites across Long Island.What You'll Be DoingPerform onsite installation, provisioning, maintenance, testing, and troubleshooting of transport network equipment.Support legacy carrier circuits including DS0, DS1, and DS3.Maintain and...

Laser Optical Engineer

Added 13/10/2026

Hiring Alert!Role: ISP Laser EngineerWork Mode: 5 Days OnsiteJob SummaryWe are seeking an experienced ISP Laser Engineer to develop and optimize laser-based manufacturing processes for glass optical fibers used in high-performance fiber optic connectors for AI data centers.The engineer will support the development, testing, and qualification of laser processes and integrate laser systems into automated manufacturing equipment. The role involves working closely with mechanical, controls, automation, and manufacturing teams to improve product quality, process efficiency, and production yield.Key ResponsibilitiesDevelop and optimize laser processes for glass optical fiber preparation, including coating removal, cleaving, and end-face shaping.Conduct Design of Experiments (DoE) to...

Optical Transport Technician

Added 04/08/2026

Job DescriptionSeeking a Network Technician / Fiber Engineer to support and maintain fiber optic and telecommunications network infrastructure. This is a hands-on role involving network troubleshooting, fiber testing, equipment installation, maintenance, and service restoration activities across transport and IP network environments.Key ResponsibilitiesTroubleshoot and maintain fiber optic and telecom network equipment.Perform network testing, installation, provisioning, and maintenance activities.Support fiber transport, Ethernet, SONET, and IP network technologies.Assist with network restoration and outage response.Perform preventive maintenance on network and critical infrastructure equipment.Maintain inventory, tools, test equipment, and related documentation.Update maintenance records, work logs, and trouble tickets.Preferred BackgroundNetwork TechnicianTelecommunications TechnicianTelecom TechnicianFiber Optic TechnicianFiber EngineerOptical...

Network Engineer

Added 01/10/2026

Network Engineer (Daily Rate Contract)Our client is seeking an experienced Network Engineer to join their team on a long-term daily rate contract based in Dublin City Centre. This role requires 5 days per week onsite and will play a key role in the design, support, optimisation and security of critical network infrastructure across a complex enterprise environment.Key ResponsibilitiesSupport and manage LAN, WAN, WLAN and enterprise network infrastructure.Configure and maintain routing, switching, wireless and network security technologies.Administer firewalls, VPNs, network segmentation and secure remote access solutions.Monitor network performance, availability and security, ensuring minimal downtime.Investigate and resolve complex network and infrastructure issues.Support...

Network Field Engineer

Added 16/09/2026

Position OverviewWe are seeking an experienced Network Field Engineer / Transport Technician to support telecommunications transport and critical infrastructure sites across Long Island.This is a hands-on, site-based field position responsible for maintaining network infrastructure, installing and provisioning transport services, troubleshooting service-impacting issues, supporting restoration activities, and ensuring field assets and equipment are properly maintained.The role will be based from Garden City, NY, with regular travel throughout the Long Island territory - from Queens and Nassau County through Suffolk County and potentially as far east as Montauk.Key ResponsibilitiesInstall, provision, test, maintain, and troubleshoot telecommunications transport equipment and services.Support circuits and transport...

AI Network Engineer

Added 15/09/2026

AI Network EngineerWe're supporting a leading international organisation that is transforming its network infrastructure through the integration of AI technologies. They are seeking an experienced Network Engineer with strong AI knowledge to help drive innovation across their network environment. Key Responsibilities:Design, implement and optimise network infrastructure solutions.Integrate AI-driven capabilities into network operations and management.Support network automation, monitoring and performance optimisation initiatives.Collaborate with cross-functional teams to identify and deliver intelligent networking solutions.Contribute to the ongoing evolution of a modern, AI-enabled network architecture.Key Skills & Experience:Strong background in Network Engineering.Experience with network automation and modern networking technologies.Knowledge of AI/ML concepts and their...

Senior Network Engineer

Added 04/09/2026

Cisco Network Engineer (CCNP) | Dublin | 12-Month ContractWe are seeking an experienced CCNP-certified Network Engineer for a 12-month contract based in Dublin. This is a fully onsite role supporting a complex Cisco enterprise environment. Key Requirements:CCNP Enterprise certification (essential) Strong experience with Cisco routing and switching technologies Knowledge of Cisco Firepower solutions desirable Experience troubleshooting enterprise LAN/WAN environments Full driver's licence required Ability to work onsite in Dublin 5 days per weekContract Details:12-month initial contract€500 per dayImmediate start preferred GCS is acting as an Employment Business in relation to this vacancy.

AlgoSec Network Security Engineer - Contract

Added 26/08/2026

Network Security Engineer (AlgoSec) We are seeking an experienced Network Security Engineer with strong AlgoSec and enterprise firewall experience to join a growing security team.This is a hands-on role focused on firewall policy management, security governance, automation and compliance across complex multi-vendor environments.Key ResponsibilitiesAdminister and support AlgoSec Security Management Suite.Manage firewall policy reviews, optimisation, risk analysis. Support FireFlow, Firewall Analyser, ObjectFlow and AppViz.Analyse application connectivity and network traffic flows.Manage firewall changes, exceptions and security incidents.Automate security processes using scripting and REST APIs.Support security governance, audit and compliance activities.Work with infrastructure, security and engineering stakeholders.Required ExperienceStrong hands-on AlgoSec experience.Extensive enterprise firewall...

Network Engineer

Added 24/08/2026

Job Title: Senior Network Engineer - Global Labs Must-Have Skills5-8 years of experience in Enterprise Networking, Data Center Operations, or Lab Infrastructure.Strong knowledge of TCP/IP, Routing, Switching, VLANs, Subnetting, and Firewalls.Hands-on experience with Cisco and/or RUCKUS networking technologies.Experience with wireless networks, WLAN controllers, terminal servers, and intelligent PDUs.Strong troubleshooting skills using Wireshark and network monitoring tools.Knowledge of VMware ESXi, Hyper-V, or KVM environments.Experience creating network diagrams, IP/VLAN plans, and technical documentation.Ability to lead projects and mentor junior technicians.Nice-to-Have SkillsCCNA, CCNP, RUCKUS, VMware, AWS/Azure, Network+, or Security+ certifications.Experience with Ixia, Spirent, and network performance testing tools.Background in vendor labs, enterprise test...

Network Engineer

Added 20/08/2026

Job Title: Senior Network Engineer - Global Labs Must-Have Skills5-8 years of experience in Enterprise Networking, Data Center Operations, or Lab Infrastructure.Strong knowledge of TCP/IP, Routing, Switching, VLANs, Subnetting, and Firewalls.Hands-on experience with Cisco and/or RUCKUS networking technologies.Experience with wireless networks, WLAN controllers, terminal servers, and intelligent PDUs.Strong troubleshooting skills using Wireshark and network monitoring tools.Knowledge of VMware ESXi, Hyper-V, or KVM environments.Experience creating network diagrams, IP/VLAN plans, and technical documentation.Ability to lead projects and mentor junior technicians.Nice-to-Have SkillsCCNA, CCNP, RUCKUS, VMware, AWS/Azure, Network+, or Security+ certifications.Experience with Ixia, Spirent, and network performance testing tools.Background in vendor labs, enterprise test...

Network Engineer

Added 20/08/2026

Job Title: Senior Network Engineer - Global Labs Must-Have Skills5-8 years of experience in Enterprise Networking, Data Center Operations, or Lab Infrastructure.Strong knowledge of TCP/IP, Routing, Switching, VLANs, Subnetting, and Firewalls.Hands-on experience with Cisco and/or RUCKUS networking technologies.Experience with wireless networks, WLAN controllers, terminal servers, and intelligent PDUs.Strong troubleshooting skills using Wireshark and network monitoring tools.Knowledge of VMware ESXi, Hyper-V, or KVM environments.Experience creating network diagrams, IP/VLAN plans, and technical documentation.Ability to lead projects and mentor junior technicians.Nice-to-Have SkillsCCNA, CCNP, RUCKUS, VMware, AWS/Azure, Network+, or Security+ certifications.Experience with Ixia, Spirent, and network performance testing tools.Background in vendor labs, enterprise test...

Network Engineer

Added 20/08/2026

Job Title: Senior Network Engineer - Global LabsProject OverviewThe Global Labs team provides enterprise lab environments and test infrastructure used by Engineering, TAC, Product Management, Sales Engineering, and Customer Engagement teams worldwide. This role will lead the design, maintenance, and optimization of lab network infrastructure supporting customer POCs, product testing, demos, and escalation environments.End ProductDeliver a secure, scalable, highly available, and well-documented global lab network that enables seamless product testing, customer demonstrations, and TAC issue replication while ensuring high uptime and operational efficiency.Must-Have Skills5-8 years of experience in Enterprise Networking, Data Center Operations, or Lab Infrastructure.Strong knowledge of TCP/IP, Routing,...

Network Engineer

Added 18/08/2026

We are seeking an experienced Network Engineer to support and maintain enterprise network infrastructure. The role involves managing routing, switching, firewalls, wireless networks, and connectivity solutions while ensuring network performance, security, and reliability.The successful candidate will troubleshoot technical issues, support infrastructure projects, and work closely with cross-functional teams to deliver effective networking solutions across physical and virtual environments.Requirements5+ years of experience in networking or IT infrastructure.Strong knowledge of TCP/IP, routing, switching, VLANs, firewalls, and wireless technologies.Experience with network vendors such as Cisco, RUCKUS, or similar.Familiarity with virtualisation platforms such as VMware, Hyper-V, or KVM.Excellent troubleshooting, problem-solving, and documentation skills.Relevant networking...

Network Field Engineer

Added 14/08/2026

Primary product focus areas:Projects across Critical National Infrastructure (Energy, Water, CNI and Blue Light clients)Security Portfolio: CCTV, Access Control, Perimeter Detection, Intruder DetectionLAN Portfolio: Private IP networks, Wireless networksWAN Portfolio: Private Mission Critical IP networks, SDH Networks, VPLS/MPLS,Cyber Portfolio: IDS, IPS, FirewallingVoice portfolio: Hosted and traditional voice offerings Primary Tasks:Commission and test equipment and systems, together with associated interfacing, ensuring accurate and timely completion in accordance with provided documentationConfiguration, fault-finding and maintenance of third party equipmentWorking to preventive and corrective maintenance plans for existing and new equipment with a focus on continuous improvement.Insuring compliance with health & safety strategy. Developing...

Network Field Engineer

Added 29/07/2026

Job DescriptionSeeking a Network Technician / Fiber Engineer to support and maintain fiber optic and telecommunications network infrastructure. This is a hands-on role involving network troubleshooting, fiber testing, equipment installation, maintenance, and service restoration activities across transport and IP network environments.Key ResponsibilitiesTroubleshoot and maintain fiber optic and telecom network equipment.Perform network testing, installation, provisioning, and maintenance activities.Support fiber transport, Ethernet, SONET, and IP network technologies.Assist with network restoration and outage response.Perform preventive maintenance on network and critical infrastructure equipment.Maintain inventory, tools, test equipment, and related documentation.Update maintenance records, work logs, and trouble tickets.Preferred BackgroundNetwork TechnicianTelecommunications TechnicianTelecom TechnicianFiber Optic TechnicianFiber EngineerOptical...