Principal Cloud Security Engineer

Cyber Advisory; Greater London; Hybrid; GBP 110,000 - 140,000; Full time

Benefits offered by this job

Private medical insurance

Life insurance

25 days holiday

Cycle to Work Scheme

Employer pension contribution 5%

Flexible working arrangements

Family-friendly policies

Job summary

G3 is seeking an exceptional Principal Cloud Security Engineer to join our growing cloud security practice in London. You will combine technical excellence with strategic influence across engagements and client outcomes.

The role focuses on designing secure, scalable architectures across AWS, Azure, and GCP, maturing DevSecOps, and guiding governance and threat modelling. You will lead security reviews and drive practice growth with an entrepreneurial mindset.

Qualifications

• 10+ years’ experience in cloud security.
• Proven track record delivering complex cloud security programmes.
• Expertise across cloud platforms, IAM, network security, data protection and security operations.
• Experience designing secure cloud architectures across AWS and Microsoft 365.
• Deep understanding of Zero Trust principles.

Responsibilities

• Design secure, resilient, and scalable cloud architectures across AWS, Azure, and GCP.
• Advise on enterprise-scale cloud transformation, migration, and modernisation.
• Mature DevSecOps capabilities, embedding security into CI/CD and IaC.
• Drive governance, architecture assurance, remediation, and control optimisation.
• Conduct threat modelling, risk assessments, and cloud security maturity reviews.

Skills

Cloud security

AWS security

Azure security

GCP security

Zero Trust

Threat modelling

Security reviews

Job description

We are looking for an exceptional Principal Cloud Security Engineer to join our growing cyber consulting practice.

We are looking for an exceptional Principal Cloud Security Engineer to join our growing cyber consulting practice.

This is a rare opportunity for a highly experienced cloud security principal engineer to combine technical excellence, and practice growth in a role that offers significant influence across clients, engagements, and the future direction of G3’s cloud security capability. You will play a key role in expanding our Cloud Security practice.

What You’ll Be Doing

• Design and deliver secure, resilient, and scalable architecture designs across AWS, Azure, and Google Cloud Platform environments.
• Advise on enterprise-scale cloud transformation, migration, and modernisation programmes, supporting across strategy through to implementation.
• Help clients establish and mature DevSecOps capabilities, embedding security into CI/CD pipelines, Infrastructure as Code, and cloud-native engineering practices.
• Drive cloud security governance, architecture assurance, security remediation, and control optimisation initiatives.
• Conduct security architecture reviews, threat modelling exercises, risk assessments, and cloud security maturity assessments.

What We’re Looking For

We’re seeking an experienced principal cloud security principal Engineer who combines deep technical expertise with strong consulting capabilities.

• 10+ years’ experience in cloud security or related disciplines.
• Proven track record delivering complex cloud security programmes within enterprise environments.
• Strong expertise across cloud platforms, identity and access management, network security, data protection, and security operations.
• Up to date experience designing and implementing secure cloud architectures across AWS and Microsoft 365.
• Deep understanding of modern security frameworks and architectures, including Zero Trust principles.

Desirable and highly advantageous

• Azure and/or Google Cloud Platform experiences.
• Excellent stakeholder management, communication, and client-facing consulting skills.
• Experience leading teams and driving successful outcomes in complex delivery environments.

One or more of the following (or equivalent):

• CISSP
• CCSP
• AWS Security Specialty
• Microsoft Cybersecurity Architect Expert
• Google Professional Cloud Security Engineer

Key attributes

You enjoy solving complex problems, building trusted client relationships, and helping teams perform at their best.

You are comfortable discussing cloud security strategy with stakeholders as you are reviewing architecture diagrams or challenging technical design decisions.

Most importantly, you bring an entrepreneurial mindset and a genuine enthusiasm for helping grow a high-performing Cloud Security practice.

Why Join Us?

• Opportunity to shape a growing Cloud Security capability.
• Work on complex, high-profile cloud security programmes across multiple industries.
• Influence senior client stakeholders and strategic security decisions.
• Collaborative, supportive, and technically strong consulting environment.
• Significant scope for professional growth, leadership, and career progression.
• Flexible working arrangements.
• Compensation (base and bonus): competitive, based on experience.
• Flexible working balance of home and office (London).
• Stakeholder employer pension contribution of 5%.
• Family friendly company – including enhanced maternity and paternity pay.
• Private medical insurance including generous terms of cover for both medical hospital, dental and mental health support for you, your partner and children (subject to T&Cs of the policy).
• Life insurance – 4 x annual salary.
• 25 days holiday per year in addition to bank holidays.
• Cycle to Work Scheme.

Please note that you need to have the right to work in the UK for this role.

Please note that you need to have the right to work in the UK for this role.

We are committed to creating a diverse and inclusive workplace and encourage applications from all qualified individuals, regardless of race, gender, disability, or any other characteristic.

We conduct rolling interviews to ensure a timely hiring process, so candidates are encouraged to apply early as positions may close once suitable applicants are found.