Senior Onsite Engineer in Brentford

Working a shift pattern of 5 days in 7, including weekends and bank holidays.

Here at Littlefish, we look for people who can make a real difference and become a giant slayer. As the world around us continues to change, we look for people who grab that change with optimism and excitement. These are the passionate and high performing people who enjoy and thrive on thinking outside the box.

The role and what you’ll be getting up to on a day to day basis:

• We’re hiring a Senior IT Onsite Engineer who brings solid technical expertise, sound judgement, and the confidence to operate as the trusted onsite expert for a key customer.
• You’ll be the person they rely on day-to-day — the steady, highly capable technical presence who resolves issues quickly, communicates clearly, and supports less experienced engineers through your knowledge and experience.
• As a Senior Onsite Support Engineer, you’ll naturally set the standard for quality, professionalism, and technical excellence within the onsite team.

You will:

• Be their primary technical contact and trusted expert.
• Build strong day‑to‑day relationships and understand their environment inside‑out.
• Provide high‑quality 1st & 2nd line support across desktops, laptops, mobiles, printers, applications and more.
• Troubleshoot confidently across Windows 10, Office 365, Exchange, Active Directory, Apple OSX/iOS and deployment technologies (SCCM/WSUS/MDT).
• Handle escalations that require senior-level technical judgement.
• Support and coach junior onsite engineers, helping raise the overall technical bar.
• Communicate complex issues in clear, straightforward language.
• Ensure all activity meets Littlefish and customer specific SLA expectations.
• Contribute to deployment work: installs, moves, upgrades, projects, device rollouts, and more.
• Maintain strong documentation, best practice and high service quality.
• Use downtime effectively for housekeeping, documentation and continuous improvement.
• Troubleshoot and resolve issues across Audio visual equipment.
• Liaise with high profile members of the organisation and prioritise accordingly.

Who you are:

• You’re someone who takes ownership, steps in proactively when things need direction, and helps keep the onsite function running smoothly.
• Previous experience in a senior onsite support engineer role.
• Strong technical breadth across modern workplace technologies.
• Confident troubleshooting of Windows 10, O365, AD, Apple, hardware, and deployment tools.
• Ability to explain complex issues simply.
• Calm, structured and methodical approach.
• Previous experience in an IT support position (1st/2nd line).
• ITIL Foundation.
• Microsoft certifications.
• Understanding of networks and patching.
• Experience in structured ITSM environments.
• Strong, demonstrable problem solving ability.
• Confidence working unsupervised, managing your own workload.
• Ability to translate complex technical issues into clear, simple language for customers.
• Calm under pressure, with strong ownership and customer management skills.
• Hands-on support experience across modern technologies: Windows 10/11, MS Office 365 & Exchange, Active Directory, Apple OSX & iOS, Printer/Desktop hardware.

What can we offer you?

• Referral bonus scheme of £1000 when you successfully refer a friend.
• Access to our LinkedIn Learning platform, with over 16000 expert-led online tutorials to enhance and achieve your personal and professional goals.
• Healthcare cash plan. This will give you access to online GP appointments, 24/7 access to qualified counsellors and cash back against a range of general healthcare.
• Casual dress policy.
• Company Pension Scheme.
• Company social events.
• 25 days annual leave plus public / bank holidays.
• Purchase of annual leave scheme.

Life at Littlefish:

Our company values shape who we are as a business, what we stand for and how we work. Hiring people with our values at heart is very important as we see Littlefish grow.

• I am High Performing - I like to raise the bar, we look at creating opportunities to increase quality and improve efficiency, we strive for service excellence.
• I am Passionate - We build team success and celebrate them together, I am enthusiastic and energetic, I care about the people I work with and we support one another.
• I Have a Can-Do Attitude - I am not afraid to step outside my comfort zone, we are not afraid to challenge status quo, we get stuff done!

So, if you feel like you can make a tangible difference, apply today, and join us on this journey.

Here at Littlefish we aim to be somewhere everyone can be themselves. We are committed to encouraging a diverse and inclusive community where everyone irrespective of who they are, or their background, can feel equal and supported.

We encourage applications from people of all backgrounds. Please get in touch if you are concerned about any difficulties you may face during your recruitment process, so we adjust accordingly.