Systems & Applications Administrator: Infra, Apps & Security

J.W. Pepper & Son, Inc.; Exton; On-site; GBP 55,000 - 75,000; Full time

Job summary

The Systems & Applications Administrator at J.W. Pepper & Son, Inc. is responsible for the administration, maintenance, support, and continuous improvement of the organization’s server infrastructure, enterprise platforms, and business applications.

You will work across Windows and Linux environments, virtualization, cloud services, and security practices, delivering reliable systems and timely application support to internal teams.

Qualifications

• Bachelor's degree or equivalent experience in IT.
• 4–7 years of enterprise infrastructure administration experience.
• Experience with Windows Server and Linux administration.
• Experience with VMware or similar virtualization platforms.
• Experience administering Microsoft 365 services.
• Scripting and automation knowledge (PowerShell, Bash, Python).
• Strong troubleshooting, analytical, and communication skills.

Responsibilities

• Administer and maintain Windows and Linux server environments.
• Support virtualization platforms and related infrastructure.
• Assist with storage, backup, DR, and business continuity.
• Monitor performance, capacity, and availability for stability.
• Patch, upgrade, and lifecycle management activities.
• Manage Active Directory and related access controls.
• Support cloud infrastructure and SaaS platforms.
• Collaborate on infrastructure projects and deployments.
• Troubleshoot application, integration, and performance issues.
• Coordinate incident resolution with developers, vendors, and stakeholders.
• Develop and maintain automation scripts and admin tools.
• Document configurations, procedures, and standards.

Skills

Systems administration

Windows Server

Linux administration

VMware / virtualization

Microsoft 365

Scripting (PowerShell, Bash, Python)

Security concepts

Troubleshooting

Automation

Communication

Education

Bachelor's degree in Information Technology, Computer Science, or related field

Tools

VMware

Microsoft 365

Azure / AWS

Job description

Position Summary

The Systems & Applications Administrator is responsible for the administration, maintenance, support, and continuous improvement of the organization's server infrastructure, enterprise technology platforms, and business applications. This role helps ensure the reliability, security, and performance of critical systems while providing technical support for internally developed and third-party business applications.

The ideal candidate combines strong systems administration skills with application support experience and is comfortable working across a diverse technology environment including Windows and Linux servers, virtualization platforms, Microsoft 365 services, storage systems, security technologies, and business applications.

Key Responsibilities

Infrastructure Administration

• Administer and maintain Windows and Linux server environments.

• Support virtualization platforms and associated infrastructure.

• Assist with storage, backup, disaster recovery, and business continuity solutions.

• Monitor system performance, capacity, and availability to ensure operational stability.

• Perform system patching, upgrades, and lifecycle management activities.

• Manage identity and access controls, including Active Directory and related services.

• Support cloud-based infrastructure and SaaS platforms.

• Participate in infrastructure projects and technology deployments.

Application Support

• Serve as a technical resource for internally developed and third-party business applications.

• Troubleshoot application, integration, and performance issues.

• Coordinate incident resolution with software developers, vendors, and business stakeholders.

• Participate in application deployment, testing, and change management activities.

• Create and maintain application support documentation and procedures.

• Identify opportunities for process improvement and application optimization.

• Assist in supporting application integrations and data workflows between business systems.

Security & Compliance

• Support cybersecurity initiatives, vulnerability remediation, and security best practices.

• Assist with audit, compliance, and documentation requirements.

• Participate in incident response and root cause analysis activities.

• Ensure systems adhere to organizational security standards and policies.

Operations & Support

• Provide technical support and escalation assistance for complex issues.

• Participate in on-call support rotations as required.

• Develop and maintain automation scripts and administrative tools.

• Coordinate with technology vendors and support providers.

• Document system configurations, procedures, and operational standards.

• Collaborate with business units to understand and support operational requirements.

Required Qualifications

• Bachelor's degree in Information Technology, Computer Science, or related field, or equivalent experience.

• 4-7 years of experience administering enterprise infrastructure and business systems.

• Experience with Windows Server and Linux administration.

• Experience with VMware or similar virtualization platforms.

• Experience administering Microsoft 365 services.

• Experience supporting business-critical applications.

• Working knowledge of networking, storage, backup, and cybersecurity concepts.

• Experience with scripting and automation tools such as PowerShell, Bash, or Python.

• Strong troubleshooting, analytical, and communication skills.

• Ability to manage multiple priorities and work independently.

Preferred Qualifications

• Experience supporting internally developed business applications.

• Experience with Azure and/or AWS cloud services.

• Experience with enterprise backup, monitoring, and logging platforms.

• Experience supporting ERP platforms, payment processing solutions, or application integrations.

• Relevant technical certifications such as Microsoft, VMware, Azure, AWS, Linux, or Security+.