Senior IT Infrastructure & Support Engineer
| Posting date: | 27 August 2025 |
|---|---|
| Salary: | £45,000 to £47,500 per year |
| Additional salary information: | Hybrid & flexible working, half-day Fridays, & more! |
| Hours: | Full time |
| Closing date: | 26 September 2025 |
| Location: | West Sussex, Southern, West Sussex |
| Company: | Holt Recruitment Group Limited |
| Job type: | Permanent |
| Job reference: | 57686840 |
Summary
Are you an experienced IT professional looking for a role where you can make a real impact on business-critical systems? We’re seeking a Senior IT Infrastructure & Support Engineer to join a forward-thinking organisation and play a key part in ensuring the reliability, security, and efficiency of complex IT environments.
This is a hands-on role where you’ll provide advanced technical support, maintain and enhance infrastructure, and strengthen cybersecurity resilience. You’ll also mentor junior team members, share expertise, and help shape the future of IT within the business.
Responsibilities
- Deliver high-level technical support, troubleshooting complex infrastructure, application, and device issues.
- Maintain and support systems including Active Directory, Azure, Exchange 365, Hyper-V, and backup solutions.
- Enhance IT security through support and optimisation of cybersecurity tools and policies.
- Drive system improvements, automation, and standardisation within IT operations.
- Act as a mentor to junior colleagues, sharing knowledge and guiding professional development.
- Contribute to disaster recovery planning, testing, and business continuity initiatives.
Experience Required
- Strong knowledge of Windows Server, Active Directory, Group Policy, DNS/DHCP.
- Proven expertise with Azure AD, Exchange Online, Office 365 and cloud identity concepts.
- Experience with Hyper-V, Veeam, WSUS, endpoint management tools.
- Understanding of network fundamentals (TCP/IP, VLANs, firewalls).
- Familiarity with endpoint protection, email filtering, SIEM, or extended AV tools.
- Exposure to ERP systems (desirable).
- Experience with Jira, Confluence, or similar collaboration tools (desirable).
Benefits
- 37.5-hour working week with lunchtime finishes on Fridays
- Hybrid / flexible working arrangements
- 28 days annual leave + Christmas closure + holiday purchase scheme
- Group pension (matched up to 5%), life assurance, and income protection
- EV salary sacrifice scheme & share incentive plan
- Wellbeing initiatives, gym discounts & Employee Assistance Programme
- Excellent learning & development opportunities
- Free onsite parking, regular social & sports activities
Security Clearance
Due to the nature of the work, applicants must be eligible for UK Security Clearance, requiring proof of UK residency for the past five years.
RW
This is a hands-on role where you’ll provide advanced technical support, maintain and enhance infrastructure, and strengthen cybersecurity resilience. You’ll also mentor junior team members, share expertise, and help shape the future of IT within the business.
Responsibilities
- Deliver high-level technical support, troubleshooting complex infrastructure, application, and device issues.
- Maintain and support systems including Active Directory, Azure, Exchange 365, Hyper-V, and backup solutions.
- Enhance IT security through support and optimisation of cybersecurity tools and policies.
- Drive system improvements, automation, and standardisation within IT operations.
- Act as a mentor to junior colleagues, sharing knowledge and guiding professional development.
- Contribute to disaster recovery planning, testing, and business continuity initiatives.
Experience Required
- Strong knowledge of Windows Server, Active Directory, Group Policy, DNS/DHCP.
- Proven expertise with Azure AD, Exchange Online, Office 365 and cloud identity concepts.
- Experience with Hyper-V, Veeam, WSUS, endpoint management tools.
- Understanding of network fundamentals (TCP/IP, VLANs, firewalls).
- Familiarity with endpoint protection, email filtering, SIEM, or extended AV tools.
- Exposure to ERP systems (desirable).
- Experience with Jira, Confluence, or similar collaboration tools (desirable).
Benefits
- 37.5-hour working week with lunchtime finishes on Fridays
- Hybrid / flexible working arrangements
- 28 days annual leave + Christmas closure + holiday purchase scheme
- Group pension (matched up to 5%), life assurance, and income protection
- EV salary sacrifice scheme & share incentive plan
- Wellbeing initiatives, gym discounts & Employee Assistance Programme
- Excellent learning & development opportunities
- Free onsite parking, regular social & sports activities
Security Clearance
Due to the nature of the work, applicants must be eligible for UK Security Clearance, requiring proof of UK residency for the past five years.
RW