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Job Title: System Administrator

Job Code: SAS20230210-106731

Job Location: London, UK

We can offer you flexible working practices and a hybrid working pattern, with time in our offices and your home, to enable a good work-life balance

Important to know:

Due to the nature of this role you will need to be a UK nationality and the ability to obtain a security clearance. Applicants who accept a conditional offer of employment must meet the requirement of right to work in the UK and must meet eligibility requirements for access to classified information and will be subject to government security checks.

About this opportunity and L3Harris UK

From 12 UK sites, our team of over 1,400 people deliver unique capabilities across air, land, sea, space and cyber for military, security and commercial customers, worldwide.

About the role:

L3Harris has an immediate opening for an Engineering System Administrator/Infrastructure Technician. The Engineering Infrastructure Technician assists cross-functional software engineering teams with the sustainment of commercial servers, networking, desktop and mobile systems along with a range of common enterprise software products. Trenchant operates globally distributed network to support its growing workforce and the role will involve close collaboration with the wider IT team across the world.

Trenchant is an elite global team of engineers and security researchers charged with building world-class computer security products. We are a trusted, discrete partner furnishing security products, consultancy, training and integration services to selected security, defense, and law enforcement agencies.

This position will require most of your time to be spent working onsite in our London offices with some opportunity to work remotely, along with some international travel as needed.

A few of our employee benefits are:

• Company bonus scheme


• 40 hours over 9-day fortnight


• Flexible, condensed or reduced working hours considered and hybrid working where possible


• 25 days holiday per year (plus bank holidays), increasing with long service and with the opportunity to buy/sell up to 5 days


• Private medical insurance with optional family cover


• Pension scheme of up to 7% employer contribution


• Life Assurance 4x salary (flexible up to 10x)


• Group income protection


• Flexible opt-in extras such as a health care cash plan, dental insurance, gym membership, critical illness cover and cycle to work scheme


• Employee assistance program providing mental health and wellbeing support

What You’ll Be Doing

• Collaborates with test infrastructure, procurement and engineering staff to understand and satisfy diverse technical support requirements.


• Engages IT to perform electrical and network interconnects required to deploy and service engineering test infrastructure.


• Monitor health and performance of servers, networking equipment and other devices critical to engineering.


• Maintains various operating system deployments, upgrading as the need arises


• Performs local-area network and infrastructure troubleshooting.


• Interfaces with IT to deploy and understand foundational hardware and software solutions.


• Fields support calls and works issues to conclusion.


• Provides support for remote or off-site employees.

Essential Skills:

• Bachelor’s Degree and minimum 2 years of prior relevant experience. In lieu of a degree, minimum of 6 years of prior related experience.


• Experience with virtualization platforms including VMware vSphere, ESXi, and cluster security.


• Experience of administration of Windows Server/Active Directory and Linux Server environments


• Experience in deploying network equipment including routers and switches. Juniper experience ideal.


• Experience with metrics monitoring, visualization and tracing platforms, such as Grafana, ELK or Splunk.


• Experience with containerization technologies.


• Experience with the safe and proper operation of basic electrical test equipment, electronics tools, and hand tools.

What else could be helpful to be successful in this role:

• Experience with bare metal systems/servers building and preparation.


• Experience with administration of Windows and Mac desktop operating systems.


• Experience of AWS deployment and management.


• Technical certification such as A+, CCNA, RHCE, MCSA, MCSE, Network+, or Security+.

As an equal opportunities employer, L3Harris is committed to the equal treatment of all current and prospective employees and does not condone discrimination on the basis of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, or marriage and civil partnership.

We aspire to have a diverse and inclusive workplace and strongly encourage suitably qualified applicants from a wide range of backgrounds to apply and join L3Harris.

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