24/7 L1 Network and Security Engineer (1st Line NOC Support)

Nomios' mission is to build a ‘secure and connected’ future. Organisations across the globe depend on us to help secure and connect their digital infrastructures.

In support of our rapid and continued UK growth, we are seeking a motivated and organised L1 Network and Security Engineer to join our Network Operations Centre working on a 24/7 shift rota. This hands-on, entry-level role supports the day-to-day monitoring and support of customer networks and is ideal for someone looking to build a career in network and security operations within a Managed Service Provider environment.

Reporting to the Network Operations Centre Manager, you will work closely with senior engineers and wider teams, contributing to incident response, initial troubleshooting, and the smooth delivery of secure, reliable services.

If you are proactive, detail-oriented, and eager to learn, we want to hear from you.

Your role as a L1 Network and Security Engineer

As a L1 Network and Security Engineer, you will play an important role within the Network Operations Centre, providing first line monitoring and support for customer networks. This is an entry level position designed for individuals who are keen to build a career in network and security operations within a Managed Service Provider environment.

You will be responsible for proactively monitoring customer networks, responding to alerts and incidents, performing initial troubleshooting, and ensuring issues are accurately logged and escalated when required. You will work closely with senior engineers and other teams while developing your technical skills through hands on experience, training, and mentoring.

Responsibilities

Key responsibilities of the role include:

Network Monitoring and Alert Handling

• Monitor customer network infrastructure using NOC monitoring tools and dashboards

• Respond to alerts and notifications as they occur

• Perform basic checks and first line troubleshooting following documented procedures

• Identify potential service impacting issues and log incidents accurately

• Escalate complex or unresolved issues to second or third-line teams in line with processes

Ticket Management

• Create, update, and manage incidents and service requests using the ticketing system

• Ensure tickets contain clear, accurate notes and are updated in a timely manner

• Prioritise tickets based on impact and urgency in line with SLA requirements

• Work with internal teams to help progress tickets through to resolution

First Line Troubleshooting and Learning

• Carry out initial diagnostics and basic network testing

• Gather logs, screenshots, and relevant information to support escalation

• Learn to identify common network and security issues through daily operations

• Ask questions and seek guidance when unsure to ensure correct handling of issues

Change and Maintenance Support

• Assist with planned maintenance activities during scheduled change windows

• Follow change management processes to ensure service continuity

• Document actions taken and provide updates during and after maintenance activities

Customer Support and Communication

• Act as a first point of contact for customer technical queries and service requests

• Communicate clearly, politely, and professionally with customers and colleagues

• Gather required information from customers to support troubleshooting and resolution

Development and Continuous Improvement

• Develop technical knowledge of networking and security technologies

• Work towards relevant training and certifications with support from the team

• Contribute ideas to improve processes, documentation, and service delivery

• Learn from feedback and apply it to improve performance and confidence