Senior Infrastructure Engineer
Requirements
Requires 7+ years of infrastructure engineering experience, with strong security and resilience design expertise, including VMware, Microsoft technologies, redundant network architectures, and business continuity strategies. Candidates should know CIS18, NIST CSF, and Zero Trust principles, have PowerShell or Bash automation skills, and be able to validate managed service provider deliverables; PAM, SIEM/SOAR, WAF, IDS/IPS, OT security, and relevant certifications are desirable.
Job Description
At A‑Gas, what we do matters — every single day. We are a global leader in Lifecycle Refrigerant Management. We help industries reduce emissions, protect the environment, and transition to a more sustainable future.
Our goal is clear: to protect and improve the environment by effectively managing refrigerants throughout their entire lifecycle.
Job Purpose
A‑Gas is strengthening its global infrastructure and cyber resilience across IT and OT environments. We are seeking a Senior Infrastructure & Cybersecurity Engineer who will support the Head of Infrastructure in designing and evolving secure, resilient infrastructure and network architectures. This role focuses on maximizing business continuity, eliminating single points of failure, and protecting critical assets.
The position holder will identify and design mitigations for cyber vulnerabilities, working closely with Managed Service Providers (MSPs) to execute remediation and validate outcomes. They will collaborate with OT engineers and Product Owners to ensure manufacturing systems, legacy operating systems, and critical business products remain available and secure.
Essential Experience
- 7+ years in infrastructure engineering, with strong exposure to security and resilience design.
- Expertise in VMware virtualization, Microsoft stack (Entra ID/Azure AD, Windows Server, Intune, M365, Defender, Sentinel).
- Proven experience designing redundant network architectures and implementing business continuity strategies.
- Familiarity with Meraki networking and firewall configuration for secure cross-business connectivity.
- Knowledge of CIS18 controls, NIST CSF, and Zero Trust principles.
- Strong scripting/automation skills (PowerShell, Bash) and ability to validate MSP deliverables.
Desirable
- Experience with PAM solutions (CyberArk or similar), SIEM/SOAR tuning, WAF, IDS/IPS.
- Exposure to industrial control systems (ICS) and OT security best practices.
Certifications
- AZ‑500 (Azure Security Engineer), SC‑100 (Cybersecurity Architect), CISSP, or equivalent.
What do you get in return?
- Competitive and attractive employment package
- Employer pension scheme
- Flexible working hours (depending on the role)
- Collective benefits program
- Employee Assistance Program (support for work and personal matters)
- Cycle to work scheme
- Team activities in summer and around Christmas
Why choose A‑Gas?
Because your work contributes to something bigger:
- A safer climate
- A more sustainable industry
- An organization with a clear mission, innovative strength, and long-term vision
Together, we are building a sustainable future.
Skills
About A-Gas
A‑Gas is the world leader in the supply and lifecycle management of refrigerants and associated products and services. Through our first-class recovery, reclamation, and repurposing processes, we capture refrigerants and fire protection gases for future re-use or safe destruction, preventing their harmful release into the atmosphere. For over 30 years, A-Gas has supported our clients and partners on their environmental journey by supplying lower global warming gases and actively increasing the circularity of the industries we serve, building a more sustainable future. The climate is changing, and we all have a part to play in protecting our planet. Achieving net-zero is an incredibly ambitious target that we cannot achieve alone, but together, we can.
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