Senior Offensive Security Consultant

Hackajob Ltd; Bristol; On-site; GBP 50,000 - 60,000; Full time

Benefits offered by this job

Hybrid working

Pension scheme

Health & wellbeing support

Training & development

Private healthcare

Job summary

Leonardo UK is seeking a Senior Offensive Security Consultant to lead the Red Team within the Cyber & Security Solutions Division. The role blends remote work with on-site collaboration at Leonardo UK and client locations, supporting a global aerospace and defence organisation.

You will drive the Red Team, contribute to external engagements, and ensure effective delivery of adversary simulations, purple team activities, and pentesting engagements.

Qualifications

• Familiar with coding languages used in offensive security (C, C#, Python, JS, Go, Rust).
• Experience delivering red team engagements across adversary simulations and penetration testing.
• Knowledge of MITRE ATT&CK and CAF frameworks and how to apply to reporting.
• Relevant red team/pentesting certifications (e.g., OSCP, OSEP, OSED, OSCE).

Responsibilities

• Lead, direct, and improve the Red Team capability and engagements.
• Deliver comprehensive adversarial simulations, purple team activities, and post-engagement reporting.
• Manage cloud environments and infrastructure for security tooling deployments.
• Collaborate with internal stakeholders and customers across sites.

Skills

Coding languages for OS/Malware

Red team engagements

MITRE/CAF framework usage

Discretion with security tooling

Regulatory certifications (CCR T S, CT

Job description

Job Description

Salary Range: £50,000 - £60,000 Leonardo UK operates a grade-based salary framework with broad bands. The salary range shown reflects the approved grade band for this role, or a narrower hiring range published within that band, and is benchmarked against the external market. Exceptions above the standard range are managed through governance controls to protect internal equity. 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. As a Senior Offensive Security Consultant at Leonardo UK, you will be responsible for leading the Red Team capability while also delivering as part of a Red Ream Delivery Cell to external customers. 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

• 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. For more information and guidance please visit: 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.

For a full list of our company benefits please visit our website.

Leonardo is a global leader in Aerospace, Defence, and Security. Headquartered in Italy, we employ over 53,000 people worldwide including 8,500 across 9 sites in the UK. Our employees are not just part of a team-they are key contributors to shaping innovation, advancing technology, and enhancing global safety.

At Leonardo we are committed to building an inclusive, accessible, and welcoming workplace. We believe that a diverse workforce sparks creativity, drives innovation, and leads to better outcomes for our people and our customers.

If you have any accessibility requirements to support you during the recruitment process, just let us know.

Primary Location: GB - Bristol - Coldharbour Lane Contract Type: Permanent Hybrid Working: Onsite