IT Technician – Level III

Radiant Systems Inc; Greater London; On-site; GBP 40,000 - 55,000; Full time

Job summary

Radiant Systems Inc is seeking an experienced IT Technician – Level III to join its London team. In this role, you will act as a senior escalation point, providing advanced technical support across systems, software, and hardware while mentoring junior technicians.

Your responsibilities include providing Tier III technical support for complex issues and overseeing helpdesk operations. The ideal candidate should have a minimum of 2 years of corporate IT experience and a CompTIA A+ certification.

Qualifications

• 2+ years of corporate IT support experience.
• 3+ years of corporate IT experience required.
• Ability to lift up to 50 lbs and perform physical tasks.

Responsibilities

• Provide Tier III technical support for complex IT issues.
• Act as primary escalation point for helpdesk tickets.
• Oversee helpdesk operations and monitor ticket queues.
• Train and mentor Level I & II IT Technicians.

Skills

Microsoft Windows OS

Microsoft Office Suite

Tier II/III support experience

Microsoft 365

Okta

Sophos

IT infrastructure understanding

Troubleshooting skills

Customer service skills

Education

High School Diploma or equivalent

CompTIA A+ or equivalent certification

Job description

About the Role

We are looking for an experienced IT Technician – Level III to join our team in London. In this role, you will act as a senior escalation point, providing advanced technical support across systems, software, and hardware while mentoring junior technicians and ensuring smooth IT operations.

Key Responsibilities

• Provide Tier III technical support for complex IT issues across hardware, software, and systems
• Act as the primary escalation point for helpdesk tickets and senior leadership issues
• Support and administer platforms such as Microsoft 365, Okta, Sophos, and access control systems
• Install, configure, image, and test hardware and software across corporate environments
• Oversee helpdesk operations, monitor ticket queues, and ensure timely resolution
• Train, mentor, and support Level I & II IT Technicians
• Contribute to IT projects and continuous improvement initiatives

Skills & Experience

• Strong knowledge of Microsoft Windows OS and Microsoft Office Suite
• Experience working in a Tier II/III support or escalation role
• Familiarity with enterprise tools like Microsoft 365, Okta, Sophos
• Solid understanding of IT infrastructure, systems, and networking basics
• Excellent troubleshooting, communication, and customer service skills
• Ability to support a wide range of office and IT equipment

Qualifications

• High School Diploma or equivalent
• Minimum 2+ years of corporate IT support experience
• CompTIA A+ or equivalent certification
• 3+ years of corporate IT experience
• Office-based role using standard IT and office equipment
• Physical activity may include lifting (up to 50 lbs), standing, and moving equipment
• Occasional travel between local offices may be required

What You’ll Gain

• Opportunity to work in a fast-paced, enterprise IT environment
• Exposure to modern tools and technologies
• Hands‑on experience with end‑to‑end IT operations and support
• Chance to mentor and lead junior team members

Apply Now

If you are a proactive IT professional with strong troubleshooting skills and experience in high‑level support, we’d love to hear from you!