Senior Network and Security Engineer

It's what we do

MLL Telecom is the UK’s leading Cross-Technology Network Integrator, spanning Fixed, Radio, and Mobile 4/5G technologies. Our mission is to underpin the communication strategies of our customers by ensuring their network infrastructures are optimally designed, developed, and maintained in a fast-changing environment. 

We architect and manage some of the most complex and secure Data/Voice networks in the Public Sector and Mobile Network Operator markets.  

Our Public Sector team delivers critical network services to local governments, the NHS and Emergency Services, acting as a trusted partner in transitioning NHS sites to a new health-dedicated network environment. 

Currently, we are the Key Delivery Partner in over 15 major UK network deployments, enabling communication between millions of users across businesses, the public sector, and communities.

About the role

We are seeking a highly skilled and experienced Senior Network and Security Engineer to join our team. This role is critical in ensuring the stability, integrity, and security of the Royal Borough of Greenwich’s network and systems. You will be part of a dedicated team responsible for providing 3rd Line Technical Support for the Royal Borough of Greenwich network along with Network design, planning, testing, implementation and assistance in the maintenance of all routers, switches, wireless access points and firewalls to ensure optimum performance at all times 

Responsibilities 

• Network design, planning, testing, implementation and assistance in the maintenance of all routers, switches, WAPs and firewalls to ensure optimum performance at all times
  
• Monitor network performance and troubleshoot issues to ensure high availability and reliability
  
• Implement and maintain security solutions including firewalls, IDS/IPS, endpoint protection, and SIEM tools
  
• Conduct regular vulnerability assessments and penetration testing
  
• Lead incident response efforts and forensic investigations
  
• Develop and enforce network and security policies, procedures, and standards
  
• Collaborate with cross-functional teams to support secure application and infrastructure deployments
  
• Mentor junior engineers and provide technical leadership on projects
  
• Provide hands-on support for network installations, upgrades, and maintenance
  
• Perform routine network health checks and diagnostics
  
• Maintain accurate documentation of network configurations and changes
  
• Support the rollout of new sites and services across the customer estate
  
• Liaise with third-party vendors and service providers to resolve technical issues
  
• Assist in the configuration and deployment of network hardware (routers, switches, access points and firewalls)
  
• Ensure compliance with internal and external security and operational standards
  

Your areas of knowledge and expertise 

• Proven experience in network engineering and cybersecurity roles
  
• Relevant certifications equivalent to CCNP, PCNSE
  
• Strong knowledge of networking protocols (TCP/IP, BGP, OSPF, STP etc.)
  
• Hands-on experience with firewalls (e.g., Fortigate, Cisco ASA, Palo Alto), switches, and routers
  
• Proficiency with security tools (e.g., Splunk, Wireshark, Nessus, CrowdStrike)
  
• Experience with cloud networking and security (AWS, Azure, or GCP)
  
• Familiarity with compliance frameworks (ISO 27001, NIST, GDPR, etc.)
  
• Excellent problem-solving and communication skills
  
• A full UK driving licence
  

The behaviours we expect from our people are...

Accountability Builds Trust 

Accountability requires some kind of honest review to reflect how we are doing against our responsibilities. This is not simply about a contract or project plan, it is about a mindset, an air that is portrayed as 'we have got this!'

Data Delivers Distinction 

We need people to think in a ‘data is valuable’ kind of way, not just for efficient operations but also for winning in the market. This is not some mechanical thing, it is a way of thinking, of seeing the world.

Challenging for Change

We want people who want to challenge the status quo.

Delivering Excellence

This belief stems from being accountable to one another. Having confidence in our data enables us to be accountable. And being prepared to challenge means we don't settle for mediocre.

At MLL Telecom we feel we have a great business and believe strongly in its potential to make a real mark within the sector. We have great people on board and are recruiting excellent new talent as we grow. Those on board are hungry to make our business a success. We are on an exciting journey and look for a passionate individual to join us in this key role.  

We are committed to equality of opportunity for all staff and applications from individuals are encouraged regardless of age, disability, sex, gender reassignment, sexual orientation, pregnancy and maternity, race, religion or belief and marriage and civil partnerships.