Infrastructure & Security Engineer
Infrastructure & Security Engineer
London / Hybrid (3 days per week)
Oritain builds technology that proves trust and transparency in global supply chains. We apply data engineering and AI to problems with real human and environmental impact, helping protect people from exploitation and enabling brands to stand behind what they sell.
As we scale, secure and reliable infrastructure is critical to everything we do.
We’re a global team across London, Auckland, Singapore and Washington D.C.
The Role
This is a hands‑on individual contributor role owning Oritain’s core infrastructure and security capabilities.
You’ll design, build and operate secure cloud, identity and network services while strengthening our security posture and compliance maturity. This is not an advisory role — you’ll be directly responsible for delivery, operations and outcomes.
You’re joining at an important point, with active ISO 27001 renewal, Cyber Essentials certification, and alignment to NIST and CMMC, supported by modern tooling (Vanta). You’ll play a key role in keeping infrastructure practical, secure and scalable.
You’ll also help shape the secure adoption of AI tooling across the organisation, ensuring it’s governed, compliant and genuinely useful.
You’ll report to the Head of IT & Security and work closely with Engineering, Service Desk and the wider business.
What You’ll Do
Design, build and secure cloud and on‑prem infrastructure services
Own identity and access management using Microsoft Entra ID, Conditional Access and RBAC
Design and implement network segmentation, firewalls, VLANs and VPNs
Build and support SD‑WAN and site connectivity
Administer Azure networking (VNets, routing, NSGs, VPN/S2S gateways)
Lead incident response alongside our external SOC
Operate Microsoft security services including Defender and Sentinel
Manage vulnerability identification and remediation
Support security compliance activities using Vanta
Help deliver ISO 27001, Cyber Essentials, NIST and CMMC alignment
Secure and help govern AI tooling (e.g. Microsoft Copilot), including DLP and Purview controls
Apply automation and AI to improve infrastructure and security operations
Skills & Experience
Essential
Hands‑on infrastructure and security engineering experience
Strong knowledge of Microsoft Entra ID, Azure and Microsoft 365
Solid networking fundamentals (VLANs, firewalls, routing, VPNs)
Experience with Defender, Sentinel or similar security tooling
Exposure to security frameworks such as ISO 27001 or NIST
Comfortable owning delivery and working across technical and non‑technical teams
Desirable
Zero Trust or advanced security monitoring experience
Infrastructure or security automation experience
Exposure to enterprise AI tooling
Relevant Microsoft, Azure or security certifications
Company Benefits
Paid Leave- 35 days (inclusive of public holidays) + your birthday off
Volunteering Leave Allowance
Enhanced Parental Leave
Life Insurance
Healthcare Cash Plan
Employee Assistance Programme (EAP)
Pension
Monthly Wellbeing Allowance
Breakfast, Snacks, Friday lunch & Barista Coffee Machine in the office
Learning Portal with over 100,000 assets available to support professional development
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