OT Network Engineer

OT Network Engineer

Do you want to work to make Power for Good?

We're the world's largest independent renewable energy company, guided by a simple yet powerful vision to create a future where everyone has access to affordable, zero‑carbon energy.

We know that achieving our ambitions would be impossible without our people. Because we're tackling some of the world's toughest problems, we need the very best people to help us. They're our most important asset, so that's why we continually invest in them.

RES is a family with a diverse workforce, dedicated to the personal and professional growth of our people, no matter what stage of their career they are at. We can promise rewarding work that makes a real impact, the chance to learn from inspiring colleagues across a growing, global network, and opportunities to grow personally and professionally.

Our competitive package offers a wide range of benefits and rewards.

As RES continues to expand its portfolio of assets and services globally, there is an increasing need to adapt the management and operation of the systems and services that support Operational Technology (OT). To address this need, RES has established a global OT Team.

We are seeking an experienced and detail‑oriented Network Engineer to provide 1st & 2nd line support across our OT estate, with primary responsibility for troubleshooting, configuring, and maintaining networking and IT infrastructure. This role is ideal for someone with a solid IT support background who is looking to deepen their networking expertise and grow into the OT space.

The role is hybrid (split between office and home‑location), with a strong focus on day‑to‑day support, ticket resolution, and configuration tasks. The successful candidate will also support the wider OT team with periodic onsite hardware deployments across the UK and Ireland, and may occasionally travel in Europe. A willingness to travel as required is expected.

• Act as support for OT network and infrastructure issues, taking ownership of tickets through to resolution.
• Remote troubleshooting, support, and configuration of OT systems, network devices, and edge infrastructure.
• Investigate and resolve incidents involving switches, firewalls, routers, servers, and end‑user devices, escalating to 3rd line where appropriate.
• Configure and maintain network equipment in line with established standards (e.g., VLANs, basic routing, firewall rules, switch port configuration).
• Monitor network health and respond to alerts, proactively identifying and addressing issues before they impact operations.
• Work remotely with other OT team members and field engineers to provide remote hands support while troubleshooting complex network issues.
• Maintain accurate documentation, including network diagrams, configuration records, asset registers, and knowledge base articles.
• Support the rollout of OT hardware by following standard deployment procedures and documentation when required to attend site, ensuring consistent and secure installations.
• Travel to operational sites on an as‑needed basis to deploy or support OT hardware (e.g., switches, firewalls, edge devices).
• Liaise with site contacts, vendors, and internal teams to coordinate access, schedules, and support activities.
• Ensure compliance with health, safety, and security protocols both remotely and while on site.
• Team administration duties including coordination of support and deployment schedules, documentation management, and support for onboarding/offboarding processes.

• Strong grasp of networking fundamentals, with a confident understanding of IP addressing, subnetting, VLANs, and basic routing concepts.
• Working knowledge of switches, routers, firewalls, and servers, including common configuration tasks and troubleshooting techniques.
• Understanding of common network protocols (TCP/IP, DNS, DHCP, SNMP, SSH, HTTPS) and how to use them in diagnosing issues.
• Familiarity with firewall rule sets and basic network security principles.
• Solid navigation, administration, and troubleshooting of Windows (including Server editions); awareness of Active Directory concepts such as users, groups, and…