Principal Cloud Security Engineer

G3; Greater London; Hybrid; GBP 100,000 - 150,000; Full time

Benefits offered by this job

Private medical insurance

Life insurance

25 days holiday per year

Cycle to Work Scheme

Employer pension 5%

Job summary

G3 is seeking a Principal Cloud Security Engineer to lead the growth of its cloud security practice. This role blends technical excellence with strategic advisory across AWS, Azure, and Google Cloud, influencing client engagements and future directions of the practice.

The ideal candidate has deep cloud security expertise, strong consulting skills, and a track record delivering complex programmes in large enterprises. London-based with flexible hybrid work options.

Qualifications

• 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.

Responsibilities

• 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.

Skills

Cloud security

Identity and access management

Network security

Data protection

Security operations

Education

CISSP

CCSP

AWS Security Specialty

Microsoft Cybersecurity Architect Expert

Google Professional Cloud Security Engineer

Tools

AWS

Azure

Google Cloud Platform

Microsoft 365

Job description

G3 is a market leader in the intelligence and investigations sector. It is one the largest human-source-focused intelligence firm headquartered in the UK and holds a leading position in most major financial and legal hubs worldwide.

G3’s intelligence offering helps C-suite, boards, legal and deal teams make the decisions that matter most to their organisations.

We work alongside clients, including many of the largest companies, law firms, and sovereign wealth and private equity funds, on many of the world's most significant corporate actions, advising on M&A, regulatory and policy matters, and senior appointments.

We also provide investigations and dispute advice, helping clients investigate fraud, support legal strategies and recover assets, alongside cyber advice to help defend against the prevailing threat environment.

Clients turn to G3 when they need a better understanding of a commercial risk, a regulatory environment or an executive team, and value the independence and discretion of our work.

G3 has been established for over 25 years, has a diverse and talented team across its office hubs, and is supported by Senior Advisers, including former heads of the US, UK, and Australian intelligence services, former Chairs of global banks, and former managing partners of law firms.

The Role

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

You will:

• 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.

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.