Associate Service Reliability Engineer (Linux System Admin)

Proofpoint; Belfast; On-site; GBP 40,000 - 60,000; Full time

Job summary

A leading cybersecurity firm in Belfast seeks an Associate Service Reliability Engineer. You'll manage Linux systems, contribute to infrastructure scalability, and improve automation across cloud environments. Ideal candidates will have strong troubleshooting skills and experience in a multi-cloud setting. The role offers competitive compensation and a commitment to learning and development.

Benefits

Competitive compensation

Comprehensive benefits

Flexible work environment

Learning and development opportunities

Annual wellness days

Qualifications

• Proven experience managing Linux systems in a production environment.
• Experience working in multi-data center/cloud setups.
• Strong skills in automating system management.

Responsibilities

• Manage a multi-site production infrastructure for Proofpoint services.
• Contribute to infrastructure design and architecture improvements.
• Participate in on-call rotation for escalated issues.

Skills

Linux system management

Troubleshooting

Automation

Scripting (Python, Bash)

Cloud technologies (AWS, Azure)

Containers and orchestration (Kubernetes)

Network protocols (TCP/IP, HTTP)

Education

Relevant field (Computer Science or similar)

Tools

Prometheus

Puppet

Terraform

KVM

Docker

Job description

Associate Service Reliability Engineer (Linux System Admin) page is loaded

Associate Service Reliability Engineer (Linux System Admin)

Apply locations Belfast, Northern Ireland time type Full time posted on Posted 19 Days Ago job requisition id R12527

About Us:
We are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. We’re driven by a mission to stay ahead of bad actors and safeguard the digital world. Join us in our pursuit to defend data and protect people.

How We Work:
At Proofpoint, you’ll be part of a global team that breaks barriers to redefine cybersecurity, guided by our BRAVE core values: Bold in how we dream and innovate, Responsive to feedback, challenges, and opportunities, Accountable for results and best-in-class outcomes, Visionary in future-focused problem-solving, Exceptional in execution and impact.

Corporate Overview

Proofpoint is a leading cybersecurity company protecting organizations’ greatest assets and biggest risks: vulnerabilities in people. With an integrated suite of cloud-based solutions, Proofpoint helps companies around the world stop targeted threats, safeguard their data, and make their users more resilient against cyber-attacks. Leading organizations of all sizes, including more than half of the Fortune 1000, rely on Proofpoint for people-centric security and compliance solutions mitigating their most critical risks across email, the cloud, social media, and the web.

We are singularly devoted to helping our customers protect their greatest assets and biggest security risk: their people. That’s why we’re a leader in next-generation cybersecurity. Protection Starts with People. Proofpoint.

The Role

As an Associate Service Reliability Engineer at Proofpoint you will develop a deep understanding of the various infrastructure services and applications that are the critical foundation for delivering Proofpoint’s next generation security products.

You will contribute to the architecture to improve scalability, operability, service reliability, capacity, and performance. You will be responsible for provisioning, maintaining, and scaling our production services across a hybrid cloud environment.

You bring a ‘cloud first’ mentality to the table and will work cross-functionally to improve automation and orchestration platforms needed to scale the business.

We are looking for passion, curiosity, attention to details, taking pride in one's work, taking ownership, and having ideas/opinions. If you’re the enthusiastic team player who cares about the infrastructure, remains calm in crisis, collaborates cross functionally, and easily writes code for automation we want to talk to you.

Your day-to-day

• Build long lasting, effective partnerships across the organization to foster collaboration between Engineering, Product Operations, and other Infrastructure Operations teams.

• Organize and manage multiple simultaneous projects

• Manage an international 24x7, multi-site production infrastructure powering the Proofpoint services, including deployment, maintenance, troubleshooting, performance tuning, and security

• Root-cause complex problems and involve multiple stakeholders, network, hardware and software that relate to scaling and performance

• Ensure proper monitoring, alerting, capacity planning and reporting in the production environment

• Contribute to the evolving design and architecture of reliable and scalable infrastructure

• Develop processes, tools, and documentation in support of production operations

• Evaluate new software, hardware and infrastructure solutions

• Participate in an on-call rotation and be willing to jump on escalated issues as needed.

What you bring to the team

• Demonstrable skills and proven experience managing, troubleshooting, and tuning Linux systems

• Demonstrable experience working in a high volume, large deployment, multi-datacentre / multi-cloud environment

• Experience automating management of systems and applications using common frameworks, platforms and coding languages

• Experience with observability technologies such as Open Telemetry and Prometheus or similar

• Experience with industry-standard foundation technologies such as TCP/IP, HTTP, DNS, SMTP, and LDAP

• Experience in management of a large, distributed computing environment

• Experience with common virtualization platforms – KVM, VMware vSphere, ESX, ESXi, and vCenter

• Advanced knowledge and experience with multiple cloud providers and technologies including AWS and Azure

• Experience with configuration management such as Puppet or Chef, scripting languages (e.g., Python, Bash) and experience with automation tools (e.g., Terraform, Ansible)

• Experience with industry-standard operational practices such as change management, incident management, and working in colocation datacentres

• Experience with containers and container orchestration platforms such as Kubernetes desired

• Excellent verbal and written communication skills

• Self-motivated, able to work both independently and cross-functionally.

Why Proofpoint

Protecting people is at the heart of our award-winning lineup of cybersecurity solutions, and the people who work here are the key to our success. We’re a customer-focused and a driven-to-win organization with leading-edge products. We are an inclusive, diverse, multinational company that believes in culture fit, but more importantly ‘culture-add’, and we strongly encourage people from all walks of life to apply.

We believe in hiring the best and the brightest to help cultivate our culture of collaboration and appreciation. Apply today and explore your future at Proofpoint! #LifeAtProofpoint

#LI-CB1

Why Proofpoint? At Proofpoint, we believe that an exceptional career experience includes a comprehensive compensation and benefits package. Here are just a few reasons you’ll love working with us:

• Competitive compensation

• Comprehensive benefits

• Learning & Development: We are committed to the growth and development of our team members, offering a range of programs including leadership and professional development workshops, stretch project assignments, and mentoring opportunities to help employees reach their full potential.

• Flexible work environment: [Remote options, hybrid schedules, flexible hours, etc.].

• Annual wellness and community outreach days

• Always on recognition for your contributions

• Global collaboration and networking opportunities

Our Culture:

Our culture is rooted in values that inspire belonging, empower purpose and drive success-every day, for everyone. We encourage applications from individuals of all backgrounds, experiences, and perspectives. If you need accommodation during the application or interview process, please reach out to [e-mail] . How to Apply Interested? Submit your application here https://www.proofpoint.com/us/company/careers . We can’t wait to hear from you!

Proofpoint Best Places to Work Awards

Proofpoint has been honored with six Best Places to Work Awards in 2024 by workplace culture leader Comparably, including Best Company Career Growth, Best Company Outlook, Best Global Culture, Best Engineering Teams, Best Sales Teams, and Best HR Teams.

About Us

We are the leader in human-centric cybersecurity. Half a million customers, including 87 of the Fortune 100, rely on Proofpoint to protect their organizations. We’re driven by a mission to stay ahead of bad actors and safeguard the digital world. Join us in our pursuit to defend data and protect people.

Our BRAVE Values:

At Proofpoint, we are BRAVE in everything we do, and our values aren’t just words—they shape how we work, collaborate, and grow.

We seek people who are bold enough to challenge the status quo, responsive in the face of ever-evolving threats, and accountable for delivering real impact.

We value those with a visionary mindset who anticipate what’s next and push cybersecurity forward, and we celebrate exceptional execution that ensures we continue to defend data and protect people.

Proofpoint is an equal opportunity employer, we hire without consideration to race, religion, creed, color, national origin, age, gender, sexual orientation, marital status, veteran status or disability.

Build Meaningful Connections:

Find your network, your allies, and your biggest fans. We know that work is simply better when you’re surrounded by people who inspire you—who share ideas, cheer you on, and genuinely want to see you succeed. That’s why we offer social circles, sponsored networks, and connection points across teams and time zones—to help you find your people, build your community, and thrive together.

Do Your Best Work:

This isn’t just a job—it’s a mission to protect people and defend data in a world that never slows down. We’re building the future of human-centric cybersecurity, and that future belongs to all of us. We take ownership, move fast, and hold ourselves accountable—because that’s what it takes to stay ahead. And we do it together, winning as one.

Build success on your terms:

Be empowered to reach your full potential through meaningful challenges and personalized support—designed around you and your goals. Whether you're growing as a leader or leveling up from great to exceptional as an individual contributor, we’re here to help you get there.