Senior Infrastructure & Cybersecurity Engineer (USA)

agaseurope; Town of Texas (WI); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Pension plan

Flexible hours

Cycle to work

Employee assistance program

Team activities

Job summary

A‑Gas is strengthening its global infrastructure and cyber resilience in the United States. We seek a Senior Infrastructure & Cybersecurity Engineer to support the Head of Infrastructure in designing secure, resilient systems across IT/OT, ensuring business continuity and protecting critical assets.

Responsibilities include partnering with MSPs, OT engineers, and Product Owners to mitigate cyber risks, design mitigations, and validate outcomes while focusing on availability and security of

Qualifications

• 7+ years in infrastructure engineering with security focus.
• Expertise in VMware virtualization and Microsoft stack.
• Designing redundant network architectures and business continuity.
• Familiarity with Meraki networking and firewall configuration.
• Knowledge of CIS18 controls, NIST CSF, and Zero Trust principles.
• Strong scripting/automation (PowerShell, Bash) and MSP validation.

Responsibilities

• Design and evolve secure, resilient infrastructure and network architectures.
• Identify and mitigate cyber vulnerabilities with MSPs and OT engineers.

Skills

Infrastructure engineering

Security design

VMware

Azure AD

Windows Server

Network architecture

Business continuity

PowerShell

Bash

MSP validation

Tools

Meraki

Defender

Sentinel

Entra ID

Azure AD

Job description

Why A‑Gas?

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.