Systems & Application Administrator

J.W. Pepper; Exton (PA); On-site; USD 90,000 - 120,000; Full time

Job summary

J.W. Pepper is seeking a Systems & Applications Administrator to manage Windows and Linux servers, virtualization, and enterprise apps. You will support Microsoft 365, cloud services, and security while collaborating with vendors and internal teams.

The role emphasizes on-call rotation, automation, and documentation to improve reliability and efficiency across a diverse tech stack.

Qualifications

• Bachelor's degree or equivalent experience in IT/CS.
• 4–7 years enterprise infrastructure and business systems experience.
• Experience with Windows Server and Linux administration.
• Experience with virtualization (VMware) and Microsoft 365.

Responsibilities

• Administer and maintain Windows and Linux servers and virtualization.
• Monitor performance, capacity, and availability; apply patches.
• Provide incident resolution for applications; coordinate with vendors.
• Develop automation scripts and admin tools; document configurations.
• Assist with storage, backup, disaster recovery, and business continuity.
• Ensure security practices and compliance.

Skills

Windows Server administration

Linux administration

VMware/virtualization

Microsoft 365 administration

PowerShell

Bash

Python

Networking concepts

Security basics

Communication skills

Education

Bachelor's degree in IT/CS 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

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+