Senior Systems Administrator – Cloud, Security & Automation

Silgan Plastics; Chesterfield (MO); On-site; USD 90,000 - 120,000; Full time

Job summary

Silgan Plastics is seeking a Systems Administrator in Missouri to manage enterprise infrastructure, including Windows servers, virtualization, storage, and cloud services. The role emphasizes stability, security, and performance of critical business systems.

The ideal candidate has 7+ years of systems admin experience, strong communication, and a drive for modernization. You will collaborate with IT Operations to deliver reliable technology solutions and support across the organization.

Qualifications

• Bachelor's degree preferred; equivalent experience considered.
• 7+ years of progressive systems administration or infrastructure engineering.
• Experience supporting enterprise environments across multiple locations.

Responsibilities

• Infrastructure Administration – Windows Server, Active Directory, DNS/DHCP, and virtualization.
• Microsoft 365 and Entra ID administration, security policies, licensing, and access controls.
• Storage management with Pure Storage; monitor health and capacity.
• Security & Compliance – assist with security hardening, audits, and incident response.
• Project Delivery & Continuous Improvement – lead or participate in migrations and deployments.
• Operational Support – Tier III escalation and on-call as required.

Skills

Strong communication

Customer-focused

Problem solving

Leadership

Collaboration

Education

Bachelor's Degree in Computer Science, Information Systems, or related field

Tools

VMware vSphere

Microsoft 365 Administration

Microsoft Entra ID

Windows Server Administration

Active Directory / Group Policy

DNS, DHCP

Pure Storage

Microsoft Azure Services

Backup and Disaster Recovery

PowerShell Scripting

Endpoint Management

Job description

Silgan Plastics is seeking a Systems Administrator in Missouri to manage enterprise infrastructure, including Windows servers, virtualization, storage, and cloud services. The role emphasizes stability, security, and performance of critical business systems.

The ideal candidate has 7+ years of systems admin experience, strong communication, and a drive for modernization. You will collaborate with IT Operations to deliver reliable technology solutions and support across the organization.