Senior Offensive Security Consultant in Bristol

Salary Range: £50,000 - £60,000

Your Impact

Leonardo UK is seeking a Senior Offensive Security Consultant to join the Cyber & Security Solutions Division team. This role is focused on leading, directing and continuously improving the Leonardo UK Red Team, ensuring the effective management, and delivery of adversary simulation, purple team, and penetration testing engagements. Supporting a global aerospace and defence organisation, you will help protect critical systems, sensitive information and operational services against an evolving cyber threat landscape. This role operates within a blended hybrid working model, combining home working with on-site collaboration at Leonardo UK and customer locations to enable effective teamwork and close engagement with internal stakeholders and customers.

What you'll do as a Senior Offensive Security Consultant

• Deliver Full spectrum adversarial simulation engagements: Deliver engagements into the public sector covering all aspects from initial access, physical intrusion, privilege escalation, through to report delivery, debrief and a post technical replay of actions performed during the engagement.
• Maintaining and developing the adversarial simulation capability: Research and development into current TTPs and maintaining/improving upon infrastructure design choice for hosting security tooling during engagements.
• Documentation and Knowledge Sharing: Maintain comprehensive documentation of infrastructure configurations, deployment procedures, and troubleshooting guidelines, and facilitate knowledge sharing among team members to ensure operational continuity and efficiency.
• Cloud Environment Management: Manage cloud environments (e.g., AWS, Azure, GCP) where security tools are deployed, optimizing resource utilization and cost-effectiveness while adhering to security best practices.
• Infrastructure Provisioning: Provision and manage the infrastructure required to run security tools ensuring high availability, scalability, and reliability.

What you’ll bring

We are looking for a motivated self-managed individual who is willing to help design and adapt a constantly evolving service; someone who can demonstrate above average analytical skills and liaise professionally with peers and customers even under pressure.

Core areas (must have)

• Comfortable with suitable coding languages for OST / Malware development (C, C#, Python, JS, Go, Rust).
• Strong technical skills within the following specialisms: Initial Access, Physical Intrusion, EDR Bypass, Cloud Exploitation, Malware Development etc.
• Demonstrable experience delivering red team engagements.
• Relevant regulatory certifications relating to red team / pentesting capability (CCRTS, CCRTM, CTL, CTM).

Desirable

• Experience in projects working within the MOD.
• A deep understanding of MITRE and CAF frameworks and how they are utilised within reporting.
• Relevant certifications relating to red teaming / pentesting capability (OSCP, OSEP, OSED, OSCE, RTO, RTO2, etc).

Security Clearance

This role is subject to pre-employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) will apply. This role requires Developed Vetting (DV) clearance prior to starting.

Location

This is a hybrid role with frequent travel required to Bristol and customers locations.

Why join us

At Leonardo, our people are at the heart of everything we do. We offer a comprehensive, company-funded benefits package that supports your wellbeing, career development, and work–life balance.

• Time to Recharge: Generous leave with the opportunity to accrue up to 12 additional flexi-days each year.
• Secure your Future: Award-winning pension scheme with up to 15% employer contribution.
• Your Wellbeing Matters: Free access to mental health support, financial advice, and employee-led networks.
• Never Stop Learning: Free access to 4,000+ online courses via Coursera and LinkedIn Learning.
• Tailored Perks: Spend up to £500 annually on flexible benefits such as private healthcare, lifestyle discounts, and gym memberships.
• Flexible Working: Flexible hours with hybrid working options.

Primary Location: GB - Bristol - Coldharbour Lane

Contract Type: Permanent