Sr Systems Engineer

Entrust Security UK Ltd; Newbury; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Pension

Allowances

Other benefits

Job summary

Entrust Corporation is seeking an experienced Infrastructure Engineer in Newbury to manage firewall, virtualization, and storage platforms. You will contribute to security architecture, automation, and operations, with cross‑functional collaboration across Security and Cloud teams. A UK national with SC clearance is preferred, and there is travel within the UK/Europe.

The role offers flexible options (remote/hybrid/on-site) and a pension plus allowances and other benefits as part of the package.

Qualifications

• Minimum of three years’ experience administering firewalls, networking and virtualization.
• Experience with Cisco ASA, Cisco FTD and Palo Alto PA-Series.
• Strong TCP/IP, VLANs, NAT and VPN knowledge.
• VMware vSphere administration and NetApp storage management.
• Automation scripting with PowerShell or Python.
• Experience with infrastructure automation tools (Ansible, Terraform).

Responsibilities

• Configure and maintain Cisco ASA/FTD and Palo Alto firewalls.
• Monitor and troubleshoot network security and performance.
• Manage VMware vSphere environments and NetApp storage.
• Develop automation for provisioning and config management.
• Collaborate with Security and Infrastructure teams and participate in on-call rota.

Skills

Firewall admin

VMware vSphere

NetApp storage

Windows/Linux admin

Automation tools

PowerShell/Python

Git version control

API automation

Tools

Cisco ASA

Cisco FTD

Palo Alto PA-Series

Job description

Join us at Entrust

At Entrust, we’re shaping the future of identity centric security solutions. From our comprehensive portfolio of solutions to our flexible, global workplace, we empower careers, foster collaboration, and build solutions that help keep the world moving safely. Entrust’s values are a cornerstone of who we are, our future business growth and how our people grow through it. We model our values by demonstrating that Customer Trust Is Earned, moving with purpose because Speed Is Intentional, taking accountability because We Own the Outcome, and building a collaborative culture where One Entrust Wins Together.

Get to Know Us

Headquartered in Minnesota, Entrust is an industry leader in identity-centric security solutions, serving over 150 countries with cutting-edge, scalable technologies. But our secret weapon? Our people. It’s the curiosity, dedication, and innovation that drive our success and help us anticipate the future.

Position Overview

The Entrust Infrastructure Team is responsible for monitoring and managing network equipment and supporting infrastructure to support customer services in EMEA and North America. The team provides proactive monitoring, troubleshooting, configuration management and operational support for customer services and infrastructure managed by Entrust. The successful candidate will report directly to the Manager of Cloud Services and work with Senior IT Engineers to monitor, administer and support company systems and customer services. The role has a strong focus on firewall and network security administration, alongside virtualisation and storage platform support. The successful candidate must be a UK national who is able to attain, or already holds, HMG Security Check (SC) clearance. Located in Newbury, Berkshire, the role will include some travel, mainly within the UK and Europe. Some weekend and out-of-hours work will also be required. Entrust supports a career development plan for colleagues who wish to gain additional work-related qualifications and experience. Salary is negotiable, and the package includes a pension, allowances and other benefits.

Key Responsibilities

• Configure, administer, maintain and troubleshoot Cisco ASA, Cisco Firepower Threat Defense (FTD) and Palo Alto PA-Series firewalls.
• Perform routine firewall patching, software upgrades, maintenance and lifecycle activities in accordance with approved change-control processes.
• Configure, review and maintain firewall access control lists (ACLs), security policies and associated network rules to meet operational and security requirements.
• Support firewall and network audits conducted by the internal Information Security team, including the provision of configuration evidence, remediation support and technical input.
• Manage firewall policies, network address translation, site-to-site and remote-access VPNs, routing and security rule changes in line with approved change-control processes.
• Monitor firewall health, availability, capacity and security events, and investigate incidents or service degradation.
• Support VMware vSphere virtual environments, including routine administration, monitoring and troubleshooting.
• Support the day‑to‑day administration, monitoring, configuration and maintenance of VMware vSphere virtual environments.
• Perform VMware platform patching, upgrades and lifecycle management activities in accordance with approved maintenance schedules and change‑control processes.
• Support the day‑to‑day administration, configuration, monitoring and capacity management of NetApp storage platforms.
• Perform NetApp storage patching, firmware updates, configuration management and maintenance activities to ensure platform resilience and security.
• Support NetApp storage platforms, including routine administration, capacity monitoring and fault resolution.
• Develop and maintain automation for infrastructure provisioning, configuration management, compliance validation and operational tasks using approved scripting and automation frameworks.
• Identify repetitive operational activities and implement automation solutions to improve efficiency, consistency and service reliability.
• Leverage AI‑assisted tools, where appropriate, to support troubleshooting, incident analysis, documentation, operational reporting and service improvement activities.
• Provide operational support for customer and internal cloud services, escalating complex issues to Senior IT Engineers where appropriate.
• Maintain accurate, auditable technical documentation, configuration records, operational procedures and change records.
• Work collaboratively with Infrastructure Operations, Security and customer‑facing teams to resolve incidents and deliver service improvements.
• Participate in an out‑of‑hours support rota and planned maintenance activities when required.

Desired Skills & Experience

• A minimum of three years’ experience administering firewalls, network switching and virtualisation technologies, including the configuration, maintenance and administration of the following:
• Cisco ASA firewall platforms.
• Cisco Firepower Threat Defense (FTD) firewall platforms.
• Palo Alto Networks PA‑Series firewalls.
• TCP/IP networking, IP subnetting, routing, VLANs, NAT and VPN technologies.
• VMware vSphere virtual environments.
• NetApp storage systems.
• Windows Server and/or Red Hat Linux administration in an enterprise environment.
• Operational monitoring, incident management, problem solving and controlled change implementation.
• Experience with infrastructure automation tools such as Ansible, Terraform or equivalent platforms
• Experience with scripting and automation using PowerShell, Python or similar languages.
• Experience using Git‑based version control and change management practices for infrastructure automation.
• Experience integrating infrastructure platforms through APIs and automation workflows.

Qualifications & Personal Attributes

• Cisco Certified Network Associate (CCNA) certification is preferred.
• Relevant Palo Alto Networks or Cisco security certifications would be advantageous.
• Excellent problem‑solving skills and strong attention to detail.
• Ability to work effectively as part of a collaborative team, sharing knowledge and supporting colleagues to achieve operational and project objectives.
• Ability to work independently with minimal supervision, manage workload priorities and deliver high‑quality outcomes.
• Strong interpersonal and communication skills, with the ability to engage effectively with technical teams, customers and stakeholders.
• Demonstrates initiative, accountability and a proactive approach to problem solving and service improvement.
• Strong organisational skills, with the ability to manage multiple activities while maintaining attention to detail and adherence to change‑control processes.
• Excellent customer support and communication skills.
• A methodical approach to troubleshooting, documentation and change control.
• Willingness to learn new technologies and pursue further professional development.

Career Growth

Whether you’re a budding developer or a seasoned expert, we’re invested in your professional journey. With learning‑forward initiatives and exciting challenges, your growth is our priority.

Flexibility

Life is all about balance. Whether you’re remote, hybrid, or on‑site, we offer flexible options that fit your lifestyle.

Collaboration

Here, your voice matters. Our teams thrive on sharing ideas, brainstorming solutions, and working together to build a better tomorrow.

Ready to Make an Impact?

If you’re excited by the prospect of innovating, growing your career, and collaborating in a dynamic environment, Entrust is the place for you. Join us in making a difference. Let’s build a more secure world—together.

We believe in securing identities—but it doesn’t stop there. At Entrust, we’re passionate about valuing all identities. Our culture is built on diversity, inclusion, and respect. From unconscious bias training for our leaders to global affinity groups that connect colleagues across the globe, we’re creating a community where everyone is encouraged to be themselves.

Apply today! For more information, visit www.entrust.com. Follow us on, LinkedIn, Facebook, Instagram, and YouTube

For US roles, or where applicable: Entrust is an EEO/AA/Disabled/Veterans Employer. For Canadian roles, or where applicable: Entrust values diversity and inclusion and we are committed to building a diverse workforce with wide perspectives and innovative ideas. We welcome applications from qualified individuals of all backgrounds, and we strive to provide an accessible experience for candidates of all abilities. If you require an accommodation, contact [e-mail].

Entrust is an innovative leader in identity‑centric security solutions, providing an integrated platform of scalable, AI‑enabled security offerings. We enable organizations to safeguard their operations, evolve without compromise, and protect their interactions in an interconnected world – so they can transform their businesses with confidence.