Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Be the go-to tech expert, solving complex issues and mentoring junior engineers.
- Company: Join a leading infrastructure client in London with a focus on quality delivery.
- Benefits: Enjoy structured learning, ongoing training, and clear progression opportunities.
- Why this job: Gain real technical authority and work in dynamic enterprise environments.
- Qualifications: Experience in senior support roles with strong skills in Microsoft technologies.
- Other info: Supportive team culture that values professional development and service improvement.
The predicted salary is between 36000 - 60000 £ per year.
Are you a senior support engineer who enjoys being the go-to technical expert on site, rather than sitting in endless ticket queues? This 3rd Line Support Engineer role places you onsite with a high-profile infrastructure client in London, acting as the highest technical escalation point. You’ll work hands-on with complex technical issues while also contributing to project work, service improvement initiatives, and the development of junior engineers. You’ll gain exposure to large-scale, enterprise environments, have genuine technical ownership, and be part of a team that values quality delivery, progression, and professional development.
What You’ll Be Doing
- Acting as the senior onsite escalation point for complex technical incidents
- Owning investigation, diagnosis, and resolution of 3rd line issues
- Supporting and managing internal infrastructure alongside ad-hoc project work
- Providing technical leadership through mentoring and guidance of junior engineers
- Managing client expectations through clear, professional communication
- Ensuring incidents, changes, and time entries are accurately logged
- Maintaining and updating technical documentation as environments evolve
- Working closely with the Service Delivery Manager to align on service standards
- Supporting continuous service improvement and wider team objectives
What We’re Looking For
- Proven experience working onsite at a client premises in a senior support capacity
- Strong hands-on experience with Microsoft Exchange and Microsoft 365
- Advanced networking knowledge (TCP/IP, routing, switching, NGFWs)
- VPN experience (site-to-site and remote access)
- Virtualisation expertise, ideally VMware in highly available environments
- SAN and storage technologies (iSCSI, SAN administration)
- Deep knowledge of Active Directory, DNS, DHCP, and Group Policy
- Administration of SharePoint Online, Teams, and OneDrive
- Confident communicator with the ability to lead and mentor
Why This Role?
- Senior onsite role with real technical authority
- Exposure to complex, enterprise-scale environments
- Structured learning and development pathways
- Ongoing access to technical training and certifications
- Supportive team culture with clear progression opportunities
If you’re looking for onsite ownership, technical depth, and long-term progression, I’d be happy to have a confidential conversation.
3rd Line Support Engineer employer: Hamilton Barnes
Contact Detail:
Hamilton Barnes Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land 3rd Line Support Engineer
✨Tip Number 1
Network like a pro! Attend industry meetups or tech events where you can connect with other professionals. You never know who might have the inside scoop on job openings or can refer you directly to hiring managers.
✨Tip Number 2
Show off your skills in real-time! Consider setting up a personal project or contributing to open-source work that showcases your technical expertise. This not only boosts your portfolio but also gives you something tangible to discuss during interviews.
✨Tip Number 3
Prepare for those tricky interview questions! Brush up on common scenarios you might face as a 3rd Line Support Engineer. Think about how you’d handle complex incidents and be ready to share your thought process with potential employers.
✨Tip Number 4
Don’t forget to apply through our website! We’ve got loads of opportunities that might just be perfect for you. Plus, applying directly shows your enthusiasm and commitment to joining our team.
We think you need these skills to ace 3rd Line Support Engineer
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that match the 3rd Line Support Engineer role. Highlight your hands-on experience with Microsoft Exchange, networking knowledge, and any mentoring you've done. We want to see how you fit into our team!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you're passionate about this role and how your background makes you the perfect fit. Don’t forget to mention your experience in enterprise environments and your approach to client communication.
Showcase Your Technical Skills: In your application, be specific about your technical expertise. Mention your experience with virtualisation, SAN technologies, and any relevant certifications. We love seeing candidates who can demonstrate their technical ownership and problem-solving abilities.
Apply Through Our Website: We encourage you to apply directly through our website for the best chance of getting noticed. It’s super easy, and you’ll be able to keep track of your application status. Plus, we love seeing applications come through our own platform!
How to prepare for a job interview at Hamilton Barnes
✨Know Your Tech Inside Out
Make sure you brush up on your technical knowledge, especially around Microsoft Exchange, Microsoft 365, and networking concepts like TCP/IP and routing. Be ready to discuss specific scenarios where you've resolved complex issues, as this will showcase your hands-on experience.
✨Showcase Your Leadership Skills
Since this role involves mentoring junior engineers, think of examples where you've taken the lead in a project or helped someone grow technically. Highlight your ability to communicate clearly and manage client expectations, as these are key aspects of the job.
✨Prepare for Scenario-Based Questions
Expect questions that put you in real-world situations, such as how you'd handle a critical incident or manage a service improvement initiative. Practise articulating your thought process and decision-making skills, as this will demonstrate your problem-solving abilities.
✨Align with Company Values
Research the company culture and values, particularly their focus on quality delivery and professional development. Be prepared to discuss how your personal values align with theirs and how you can contribute to a supportive team environment.
