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Robert Half Logo Robert Half · IT - Administration

Sr Systems Engineer

United States, Villa Park · Job Posted June 02, 2026
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Job Description

We are looking for an experienced Sr Systems Engineer to support and enhance enterprise infrastructure in Illinois. This Long-term Contract opportunity is ideal for a technical leader who can resolve complex systems challenges, strengthen security, and improve reliability across cloud and on-premises environments. The role will focus on modernizing core platforms, advancing automation, and partnering with cross-functional teams to deliver scalable, well-governed infrastructure solutions.

Job Responsibility

  • Serve as the primary technical resource for diagnosing and resolving advanced infrastructure, platform, and systems-related issues
  • Lead the alignment and consolidation of acquired or distributed environments to promote consistency, security, and operational stability
  • Create and maintain automation tools and scripts using Python and/or Bash to streamline administration and reduce manual effort
  • Manage and improve Microsoft 365, Azure, and related identity services to ensure performance, availability, and effective access management
  • Direct infrastructure security efforts by applying hardening standards, addressing vulnerabilities, and improving overall risk posture
  • Work closely with application and technology teams to support secure integrations and dependable system connectivity
  • Enhance cloud design, backup and recovery capabilities, and data protection practices to strengthen resilience and integrity
  • Contribute to audit and regulatory readiness by supporting infrastructure controls tied to compliance programs
  • Partner on technology initiatives to deliver scalable, secure, and efficient infrastructure outcomes across the organization

Requirements

  • At least 7 years of experience in systems engineering, senior systems administration, or closely related infrastructure roles
  • Strong hands-on expertise with Microsoft technologies, including Microsoft 365, Azure, Active Directory, and Azure Active Directory
  • Practical scripting and automation experience using Python, Bash, or both
  • Demonstrated background in system hardening, vulnerability remediation, and infrastructure security troubleshooting
  • Ability to function as a technical lead and trusted escalation point for complex operational issues
  • Experience supporting cloud-based and hybrid infrastructure environments in enterprise settings
  • Working knowledge of Microsoft Windows Server, Microsoft Exchange, and Citrix technologies

What we offer

  • medical
  • vision
  • dental
  • life and disability insurance
  • 401(k) plan
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