Ethos is a collaborative team of engineers, consultants, and creative thinkers designing and delivering data centre and energy infrastructure across the world's most dynamic markets. As a multidisciplinary consultancy, we combine technical expertise, creativity, and integrated delivery to lead complex, mission-critical projects.
Built on strong relationships, clear leadership, and a can-do mindset, Ethos is entering an exciting phase of growth, expanding our capabilities and taking on increasingly high-impact projects across EMEA and beyond.
Sustainability guides how we design, collaborate, and deliver, creating innovative solutions and lasting value for our clients and communities — making Performance Made Possible.
The Senior Physical Security Design Engineer is a senior technical role within the Smart Buildings team, responsible for the delivery of high-quality physical security designs across mission-critical, data centre and complex infrastructure projects.
Working alongside the Physical Security Technical Design Lead and multidisciplinary engineering teams, you will take ownership of the technical development of security designs from concept through detailed design, ensuring solutions are compliant, coordinated and aligned with client requirements, industry standards and operational objectives.
The successful candidate will act as a technical authority for physical security systems, supporting project delivery through design development, technical reviews, coordination with other engineering disciplines and mentoring of junior engineers. This role requires extensive experience in designing integrated physical security systems within complex-built environments, particularly data centres and other critical infrastructure.
Responsibilities
Lead the technical design and coordination of integrated physical security systems including CCTV, Access Control, Perimeter Intrusion Detection Systems (PIDS), Intrusion Detection Systems (IDS), Intercom and Security Management Systems.
Produce and review security design documentation including design reports, technical specifications, equipment schedules, calculations, schematics, layouts and detailed construction drawings.
Develop security strategies and engineering solutions that satisfy client operational requirements while complying with relevant standards, legislation and project objectives.
Coordinate physical security designs with ICT, Electrical, Mechanical, Architectural, Civil and Structural disciplines to ensure fully integrated design solutions.
Participate in technical workshops with clients, operators, architects, contractors and specialist vendors to develop and validate security design requirements.
Undertake technical assessments including Threat, Vulnerability and Risk Assessments (TVRA), security zoning studies, design risk assessments and engineering option appraisals.
Review vendor proposals, technical submissions and contractor deliverables to ensure compliance with project specifications and design intent.
Prepare equipment schedules, cable schedules, device layouts and system architecture diagrams suitable for construction and procurement.
Ensure designs comply with relevant British, European and International Standards together with applicable client design standards and regulatory requirements.
Undertake design coordination reviews using BIM/Revit, Bluebeam and other digital engineering tools.
Carry out design QA/QC reviews and technical assurance activities in accordance with the company's Quality Management System.
Support commissioning planning, witness testing and technical issue resolution during construction and project delivery.
Provide technical mentoring and guidance to graduate and junior engineers, supporting continuous professional development within the team.
Maintain awareness of emerging technologies, industry trends and best practice in physical security design, particularly within hyperscale and colocation data centre environments.
Support continuous improvement initiatives through the development of design standards, templates, technical guidance documents and lessons learned.
Qualifications & Experience
Degree in Electronic, Electrical, Building Services, Security Engineering or a related discipline.
Experience designing physical security systems for data centres, critical infrastructure or other high-security facilities.
Proven delivery of RIBA Stages 2–5 (or equivalent) physical security designs.
Experience producing specifications, reports, schematics, layouts and coordinated design documentation.
Experience working within multidisciplinary engineering teams.
Knowledge of BIM workflows and proficiency in AutoCAD, Revit, Bluebeam and Microsoft Office.
Ability to manage multiple projects and deliver high-quality work to programme.
Strong knowledge of integrated security systems, including:
Understanding of physical security design for mission-critical facilities.
Knowledge of relevant EN, ISO, BS and IEC standards.
Familiarity with security risk management, Defence in Depth and layered security principles.
Understanding of IP networking, security system resilience, cybersecurity interfaces and structured cabling.
Professional membership or certification (e.g. PSP, ASIS, CPNI, CPP, Security Institute, BICSI).
Join collaborative leaders – Work alongside experienced, approachable professionals who
combine technical excellence with calm, supportive leadership.
Make a real impact – Contribute to mission-critical infrastructure projects that support the digital and energy transition across EMEA and beyond.
Grow with us – As a rapidly growing consultancy, we offer opportunities to develop your skills, broaden your experience, and build your career.
Shape a more sustainable future – Sustainability isn't an initiative—it's embedded in every project, every discipline, and every decision we make.
Flexible Fridays and a 9-day fortnight working schedule — enjoy every second Friday off to maintain work–life balance.
A culture that values flexibility, learning, and teamwork, with clear progression pathways and support toward professional accreditation.
Opportunities to work alongside some of the most experienced engineers in the industry, within a forward-thinking, technology-driven consultancy.
Benefits:
Flexible working times
25 Days holidays
Pension Scheme
Refer a Friend scheme
Subsidised Health Insurance Allowance
Working travel out-of-pocket expenses
Regular training/mentoring / further college support
Support for Chartership
A Professional Subscription Fee paid by the company
Paid Statutory Leaves
Heavily subsidised social committee
