Infrastructure & Security Engineer

SATOS Jobs; City Of London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Hybrid working 3 days in office

35 days paid leave (incl. holidays)

Birthday off

Enhanced maternity/paternity leave

Life insurance

Healthcare cash plan

EAP

Pension

Wellbeing allowance

Office snacks & barista coffee

Job summary

Oritain is seeking an Infrastructure & Security Engineer to own security and infrastructure foundations, reporting to Head of IT & Security. You will secure cloud, identity and network environments and mature ISO 27001 renewal, Cyber Essentials, and alignment with NIST and CMMC frameworks.

This senior, hands-on role focuses on strengthening security posture early, with collaboration across Service Desk, Engineering, and business teams.

Qualifications

• Senior, hands-on experience delivering IT infrastructure and security.
• Experience with Azure and Microsoft 365 infrastructure, Defender and Sentinel.
• Knowledge of ISO 27001, NIST and Cyber Essentials frameworks.

Responsibilities

• Own security and infrastructure foundations to support growth.
• Secure cloud, identity and network environments; lead compliance activities.
• Coordinate and lead incident response with SOC when needed.
• Design and improve cloud and on-premises services; manage access controls and network security.

Skills

Security architecture

Cloud security

Vulnerability management

Incident response

Tools

Azure

Microsoft Entra ID

Microsoft Defender

Microsoft Sentinel

Vanta

Job description

Infrastructure & Security Engineer

Department: IT & Security

Employment Type: Permanent - Full Time

Location: London

Description

Oritain is a global leader in forensic origin verification of products and raw materials. With offices in London, Auckland, Dunedin, Paris, Singapore and Washington D.C, our vision is to be the source of truth in global supply chains. Through our proprietary methodology, our mission is to harness cutting edge science, data, and specialised services to create a community of origin verified buyers and suppliers, protecting our people and planet. We empower the world's leading brands to make positive changes across their supply chain; ensuring product integrity, meeting regulatory demands, and reducing the risk of fraud and unethical sourcing, creating real change in our world.

About the role

We're looking for an Infrastructure & Security Engineer to take ownership of the security and infrastructure foundations that support Oritain's growth. Reporting to our Head of IT & Security, you'll secure our cloud, identity and network environments and play a central role in maturing our compliance programme through ISO 27001 renewal, Cyber Essentials certification and alignment with the NIST and CMMC frameworks.

This is a senior, hands‑on role for someone who thrives taking on a task, shaping the plan, bringing the right people together and delivering it. In your first months, around half of your time will focus on strengthening our security posture, so you'll make a visible impact early.

You'll work closely with our Service Desk, Engineering teams and colleagues across the business. While there are no direct reports, you'll be a leading voice in the team: drawing in colleagues to deliver projects, guiding others on how to build securely and helping shape how we work. You'll also lead the secure adoption of AI across Oritain, bringing an AI‑first approach to how we run and protect our infrastructure.

We're a fast‑growing business, and many of our processes are still being built. If you see that as an opportunity to create structure, raise standards and leave your mark, you'll find real scope to grow here, including the chance to build expertise in our modern cloud‑based networking and security platform.

What you'll be doing

Your core focus will be the security of our infrastructure and platforms. You'll identify, track and remediate vulnerabilities, stay ahead of patching priorities, and administer and continuously improve Microsoft Defender and Microsoft Sentinel, integrating infrastructure and security tooling for monitoring and detection. When incidents happen, you'll coordinate and technically lead the response alongside our external Security Operations Centre (SOC).

You'll drive our compliance and accreditation work for ISO 27001, Cyber Essentials, NIST and CMMC, using Vanta to manage control coverage and evidence collection. You'll also contribute to the ongoing development of our Information Security Management System (ISMS) and conduct third‑party risk assessments, using automation, Vanta and AI to work efficiently.

On the infrastructure side, you'll design, build, secure and improve our cloud and on‑premises services. This includes delivering identity and access solutions with Microsoft Entra ID, Conditional Access, role‑based access control and secure authentication, and administering Azure infrastructure such as VNets, routing, VPN and site‑to‑site gateways, and network security groups. You'll design network segmentation using VLANs, firewall rules and access controls, build and troubleshoot SD‑WAN technologies, and support wired and wireless networking, including RADIUS and certificate‑based authentication.

You'll also lead the secure adoption of AI across Oritain. That means designing, deploying and securing tools such as Microsoft Copilot and Claude, with data loss prevention (DLP) and Purview controls across Microsoft 365 and Azure. You'll define AI guardrails, governance standards and usage policies, assess risks such as data leakage and regulatory exposure, and apply AI and automation to make our infrastructure and security workflows more efficient.

What we're looking for

You'll bring senior, hands‑on experience delivering and supporting IT infrastructure and security, ideally in an organisation of a similar size with global reach, or larger. Most importantly, you'll have a track record of taking a broad security objective, defining the approach and delivering it end to end with minimal direction.

Technically, you'll have strong working knowledge of Microsoft Entra ID, identity and access management and secure authentication, alongside practical experience with Azure and Microsoft 365 infrastructure, including Microsoft Defender and Sentinel. You'll have solid networking fundamentals, including VLANs, switches, firewalls, routing and VPNs, and experience supporting security incident response and vulnerability management.

You’ll also have working knowledge of security frameworks such as ISO 27001, NIST and Cyber Essentials, with experience supporting audits, ISMS activities or compliance tooling such as Vanta. You'll communicate clearly and feel confident working with, influencing and supporting both technical and non‑technical colleagues. Above all, you'll bring energy, curiosity and real ownership, with the openness to share ideas, take feedback and keep learning.

It would be great if you also have

Experience with Zero Trust architectures beyond baseline identity and access controls, advanced security monitoring, detection engineering or SIEM tuning, or automation and scripting would be a real advantage. We'd also value exposure to enterprise AI tooling beyond standard end‑user use, experience with SASE or cloud‑based SD‑WAN platforms, and relevant Microsoft, Azure, networking or security certifications.

If you don't meet every point but are excited by the role, we'd still love to hear from you.

What you’ll get

At Oritain, exceptional performance doesn't go unnoticed. We believe in rewarding high performers with meaningful opportunities, whether that's taking on new projects, influencing business decisions or accelerating your career development.

As a member of our IT & Security team, you'll work closely with our Service Desk, Engineering teams and colleagues right across the business, giving you broad exposure and the opportunity to make a visible impact on Oritain's continued growth. You'll have access to senior leaders, collaborate with experts in their fields and help protect a business that is solving some of the most important challenges facing global supply chains today.

In return for your ambition and impact, you'll join a collaborative, purpose-driven organisation where your growth is taken seriously, your work has real influence and your success is recognised.

• Hybrid working (minimum 3 days per week in our Farringdon office)
• 35 days paid leave, inclusive of public holidays
• Birthday off
• Enhanced Maternity and Paternity Leave
• Life insurance
• Healthcare Cash Plan
• Employee Assistance Programme (EAP)
• Pension
• Monthly Wellbeing Allowance
• Breakfast, snacks, Friday lunch and barista coffee in the office
• Learning portal with over 100,000 assets for professional development

We believe great teams are built from different perspectives, experiences, and ways of thinking. We welcome applications from everyone and encourage you to bring your whole self to the process. If there's anything we can do to support you, including any reasonable adjustments at any stage of hiring, please let the team know.