Infrastructure & Cyber Security Specialist
First seen by Alion on Oct 26, 2026. Adecco scores A on the Alion truth index.
Infrastructure & Cyber Security Specialist
Salary: Up to £55,000 DOE
Location: Remote (UK) with occasional travel to Essex
Full Time | Permanent
Are you passionate about cyber security and looking for an opportunity to make a real impact within a growing organisation?
We are seeking an experienced IT Infrastructure Security Specialist to join a well-established business and play a key role in maintaining, enhancing and evolving the company's cyber security posture. This is an excellent opportunity for someone who enjoys a varied role spanning security operations, infrastructure security, compliance, incident response and security improvement projects.
This position is predominantly remote, with occasional travel to the company's Essex office when required.
Key Responsibilities
Manage and enhance cyber security controls across the IT infrastructure.
Monitor, investigate and respond to security incidents and threats.
Support the implementation and management of SIEM, endpoint security and monitoring solutions.
Conduct vulnerability assessments and coordinate remediation activities.
Implement and maintain Microsoft security technologies including Entra ID, Defender and Purview.
Develop and enforce security policies, standards and best practices.
Support internal and external audits, compliance activities and security assessments.
Ensure alignment with recognised security frameworks and regulatory requirements.
Work closely with internal stakeholders and third-party providers to improve overall security posture.
Assist with business continuity, disaster recovery and risk management initiatives.
Identify opportunities for continuous improvement across security processes and controls.
Skills & Experience Required
Minimum 3 years' experience within Cyber Security, Infrastructure Security or Information Security.
Strong hands-on experience with Microsoft security technologies including:
Microsoft 365 Security
Microsoft Entra ID
Microsoft Defender
Microsoft Purview
Intune
Azure Security
Experience with incident response, threat detection and remediation.
Knowledge of SIEM technologies and security monitoring.
Vulnerability management experience and familiarity with related tooling.
Understanding of security frameworks and standards such as NIST, ISO 27001, Cyber Essentials or NIS2.
Experience supporting audits, compliance and governance activities.
Strong analytical and problem-solving skills.
Excellent communication skills with the ability to engage technical and non-technical stakeholders.
Desirable Experience
Microsoft Sentinel experience.
DLP (Data Loss Prevention) and data classification.
Experience within manufacturing, industrial or operational technology (OT) environments.
Relevant certifications such as Security+, SC-200, SC-300, AZ-500, CISSP, CISM or similar.
What's On Offer
Salary up to £55,000, depending on experience.
Predominantly remote working.
25 days holiday plus bank holidays.
Company pension scheme.
Life assurance and company sick pay.
Employee Assistance Programme.
Ongoing training and professional development.
Opportunity to work with modern security technologies and influence cyber security strategy.
Supportive and collaborative IT environment.
Equal Opportunities
Our client is committed to creating an inclusive workplace and welcomes applications from candidates of all backgrounds. Selection will be based solely on skills, experience and suitability for the role.
Right to Work
Applicants must have the right to work in the UK. Unfortunately, sponsorship is not available for this position.
Adecco acts as an employment agency for permanent recruitment and an employment business for the supply of temporary workers. The Adecco Group UK & Ireland is an Equal Opportunities Employer.
By applying for this role your details will be submitted to Adecco. Our Candidate Privacy Information Statement explaining how we will use your information is available on our website