Cyber Security Specialist

Cyber Security Threat Hunting Principal within Security and Information Management

Location: Newport and Titchfield

Salary: Apply before 11:55 pm on Thursday 5th November 2026

Working Patterns: All our vacancies are offered as a flexible option of Fulltime, Parttime, Flexible working, Job Share

Closing date Apply before 11:55 pm on Thursday 5th November 2026

The Office for National Statistics (ONS) is the UK’s largest producer of official statistics, covering a range of key economic, social and demographic topics. These include measuring changes in the value ofthe UK economy, estimating the size, geographic distribution and characteristics of the population, and providing indicators of price inflation, employment, earnings, crime and migration.

The last few years has seen an extensive overhaul of security and information management to meet the challenges of corporate and statistics transformation in technology, methods and practice, the Digital EconomyAct and organisational risk appetite. The capability is evolving and expanding to address changes in threat and business direction.

This Cyber Security Threat Hunting Principal role sits within the Security and Information Management (SaIM) Directorate, which operates six key services across ONS.

The role will lead in delivering the Cyber Security Threat Hunting function which is part of the Cyber Security division, within the Security and Information Management directorate.

This will involve having a detailed understanding ofthe methods used to malicious attackers as well as business understanding to be able to identify unusual and malicious activity. The role will lead on complexity threat hunts to proactively identify potential malicious activity present in the ONS IT estate and vulnerabilities that could be used for malicious activity. Findings from these threat hunts will be reported to the senior leaders in Security and Information Management, Cyber Security Threat Hunting Principal will advice and lead on remediation steps against identified findings

and vulnerabilities.

In addition, the role holder will assist in major incident response providing highly skilled resource to the Cyber Security Incident Response Principal when required.

Typical assignments

• Delivering strategic objectives for Cyber Security Threat Hunting function over the three-year Security and Information Management (SaIM) strategy period.
• Conduct Cyber Security Threat Hunting aligned to the cyber threat faced by ONS, scope the threat hunts hypothesis and report the findings to the Head of Cyber Security.
• Identify opportunities to improve the quality of security alerts and work with the cyber analytics to implement changes to alerting, ensuring allteams involved are briefed and appropriate and high-quality documentation is created.
• Identify misconfiguration and other vulnerabilities present in the ONS network, leading the remediation, working with the stakeholders in Vulnerability Management.
• Liaise with other government departments to assist in the identification and remediation of cyber security threats.

In return we offer

• Hybrid working
• A market leading pension scheme - our employer contribution rate is around 28%
• A choice of working patterns: full-time, part-time, job-share.
• Maternity, adoption or shared parental leave of 26 weeks full pay (subject to qualifying criteria)
• Employee Assistance Programmes
• Diversity Network Groups
• Mental Health Allies
• Civil Service Sports and Social club
• Generous holiday allowance – 25 days annual leave, rising to 30 days after 5 years service in addition to 9 public holidays

For more information about this role, a full application pack, and to apply, please follow the APPLY link to Civil Service Jobs