System Administrator | Irvine, CA

Title:

System Administrator

Work location:

Irvine, CA
Interview :
Virtual

Note from manager:

Our transition from on-premise infrastructure to AWS (lift-and-shift model on EC2), we need a replacement resource who can support both:

Traditional system administration and deployment activities

AWS cloud infrastructure operations

Ongoing CI/CD pipeline support (Jenkins)

SSL lifecycle management and automation

Although our workloads have moved to AWS, we are still operating primarily in an EC2-based architecture and require strong infrastructure-level administration.

Description:

The Systems Administrator will serve as a technical leader responsible for defining and executing strategies for maintenance, standards, lifecycle management, design, and implementation of the company s server and infrastructure environment. Responsibilities include complex troubleshooting, performance analysis, integration testing, and both business and technical evaluation of proposed solutions.

• Perform Linux and Windows Server administration.
• Install, configure, and maintain server components including:
  • Windows Server
  • Linux distributions
  • Active Directory, DNS, DHCP
  • File and Print services
  • VMware virtualization
• Maintain and optimize server roles for performance, reliability, and security.

• Support and maintain Adobe AEM environments, including:
  • User and permission management
  • Dispatcher configurations
  • Webserver integration (Apache/IIS)
• Monitor AEM performance, logs, replication, and workflows.
• Troubleshoot AEM-related issues and collaborate with Dev Ops/development teams on deployments and updates.
• Assist with AEM patching, upgrades, and environment hardening.

• Support and manage AWS workloads, including:
  • EC2 instance administration
  • S3 storage management
  • IAM account, role, and policy oversight
  • VPC networking and connectivity
  • Cloud Watch monitoring, metrics, and alerts
• Assist with:
  • OS patching and maintenance for cloud-hosted instances
  • Resource optimization and cost management
  • Capacity planning and environment scaling
• Collaborate with cloud engineering and automation teams on deployments or platform improvements.

• Continuously monitor server health, performance, and availability.
• Identify, troubleshoot, and resolve server and service issues.
• Respond to helpdesk tickets through ITSM systems efficiently.
• Assist with building and maintaining desktop/laptop OS images.
• Maintain accurate server and infrastructure inventory, asset history, and lifecycle data.

• Implement and maintain security controls across Linux, Windows, AWS, and AEM environments.
• Apply security updates, patches, and configuration hardening.
• Ensure adherence to industry standards, corporate policies, and regulatory requirements.
• Support identity and access management best practices.

• Create and maintain user accounts, groups, permissions, and access policies for:
  • Active Directory
  • AEM
  • AWS IAM
• Enforce least privilege and secure access management principles.

• Monitor system performance metrics and logs.
• Identify and resolve bottlenecks across server, storage, and application layers.
• Optimize infrastructure components for efficiency and uptime.

• Manage installation, updates, and configuration of server-based applications.
• Ensure proper software licensing, compatibility, and deployment processes.
• Support application deployments for AEM, Windows services, and Linux-based tools.

• Develop and maintain automation scripts using Power Shell, Bash, or Python.
• Automate tasks such as provisioning, monitoring, reporting, and configuration.

• Provide technical expertise for infrastructure-related projects including server upgrades, cloud migrations, and AEM environment enhancements.
• Participate in capacity planning and infrastructure roadmap discussions.
• Recommend improvements based on performance data, business requirements, and best practices.

• Maintain documentation for configurations, procedures, standards, and troubleshooting.
• Follow established change management processes for updates, patches, and deployment activities.

• Work with vendors to procure, maintain, and support hardware, software, and cloud services.
• Oversee vendor support cases and contract relationships.
• Collaborate with internal customers, teams, and external partners effectively.

• Bachelor s degree in Information Technology or related field preferred.
• Minimum 6 years as a primary administrator for:
  • Windows and Linux servers
  • VMware
  • Active Directory
  • M365/Entra
• At least 1 year of experience in network administration or engineering.
• Hands-on experience with AWS and Adobe AEM preferred.
• Strong analytical, troubleshooting, and communication skills.
• Ability to manage priorities, deliver on deadlines, and work effectively…