Principal Security Consultant

Tetra Tech; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Hybrid working

Flexible working locations

Job summary

Tetra Tech is seeking a Principal Security Consultant to lead security projects across diverse sectors, with a focus on the built environment and risk-informed solutions. You will mentor junior professionals and deliver high-caliber work in partnership with our clients and colleagues.

The role requires strong experience in protective security design, risk assessment using ISO 31000, and delivery through the RIBA Plan of Work, with UK-wide travel and eligibility for UKSV clearance.

Qualifications

• Built environment security consultancy experience with a track record of delivering security projects.
• Professional security qualification (ASIS PSP/CPP, CSMP or equivalent) and active pursuit of chartered status.
• Strong reporting and stakeholder communication skills; eligible for UKSV clearance and DV.

Responsibilities

• Lead the delivery of security projects across diverse sectors, ensuring technical excellence and client satisfaction.
• Oversee project resources, technical specifications, quality assurance and delivery performance.
• Mentor junior security professionals and drive technical innovation and professional development.
• Engage with clients to translate requirements into clear security briefs and identify opportunities.

Skills

Technical security expertise

Security risk assessments

Project leadership

Stakeholder management

Mentoring

Education

ASIS PSP/CPP or CSMP

Chartered status (towards)

Tools

RIBA Plan of Work

GovS 007: Security

UK clearance processes

Job description

Join Tetra Tech's specialist security consultancy team, where your technical expertise and leadership will help deliver innovative, risk-informed security solutions across the built environment. Work alongside experienced, professionally registered specialists on complex, high-profile projects that make a real difference.

Purpose & Scope of the Role

As a Principal Security Consultant, you'll lead the delivery of security projects across diverse sectors, displaying technical excellence and a focus on customer satisfaction.

You’ll oversee project resources, support operational performance and provide trusted technical guidance to clients and colleagues, ensuring consistently high standards of delivery.

Your Impact in this position

You’ll play a pivotal role in shaping security strategies, driving technical innovation and strengthening client relationships. By mentoring junior security professionals, influencing project outcomes and identifying new business opportunities, you’ll help develop our people, capabilities and growing security consultancy.

• Technical Security Expertise: Apply your knowledge of protective security design, electronic security systems and security operations to deliver effective solutions, particularly across UK Government and MoD environments.
• Security Risk Management: Lead threat and risk assessments using ISO 31000 principles, translating complex security challenges into practical, proportionate solutions aligned with GovS 007: Security.
• Project Delivery: Deliver security projects through the RIBA Plan of Work, managing resources, technical specifications, quality assurance and delivery performance.
• Client Engagement & Business Development: Build trusted relationships, translate client requirements into clear security briefs and contribute to new opportunities and strategic partnerships.
• People Leadership & Technical Innovation: Mentor junior security professionals, champion professional development and collaborate with National Technical Authorities to advance technical standards and innovation.

Qualifications & Experience

You’ll bring demonstrable built environment security consultancy experience, ideally supported by a professional security qualification (such as ASIS PSP/CPP, CSMP or equivalent) and have achieved of actively working towards chartered professional status. Strong technical reporting, and stakeholder communication skills are essential.

You must be a sole UK national, eligible for UKSV SC clearance and willing to undergo DV. Existing clearance is advantageous.

We offer hybrid working, combining office, project-site and remote working. You’ll be expected to attend an office or project site up to three days per week, with flexibility around project requirements.

UK-wide travel will be required to support clients and project delivery.

About Tetra Tech

Tetra Tech is a leading provider of consulting and engineering services working across the full project lifecycle worldwide.We have a wide rangeofexpertiseacross our teams, providing a global support network with a personalised approach to client relationships to better understand where we can add value.We provide a collaborative environment that supports individual performance, innovation, and creativity.

We support public and private sector clients on local, national, and international projects to deliver sustainable and resilient solutions. Our operations in the UK, Ireland, and the Netherlands include more than 6,000 employees who are Leading with Science to solve our clients’ most complex problems.

In alignment with the Equality Act 2010, we will make reasonable adjustments to support candidates and employees requiring additional arrangements. This could include adaptations to work schedules, training approaches, or the physical workspace. Please inform us if you need any accommodations during the recruitment process or in your day-to-day role