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Robert Half Logo Robert Half · IT - Administration

Infrastructure And Security Engineer

United States, Naperville · Job Posted June 04, 2026
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Job Description

Our client is seeking an experienced Infrastructure Security Engineer to support and secure a hybrid Microsoft environment spanning both on-premises and cloud platforms. This role is ideal for a hands-on professional with deep experience across traditional server and network infrastructure, along with responsibility for enterprise security tooling, threat monitoring, and ongoing security operations. The organization is currently in a hybrid state and actively transforming to a more cloud-centric environment, so this individual will play a key role in both day-to-day operational security and longer-term modernization efforts.

Job Responsibility

  • Manage and secure core infrastructure, including servers, networks, firewalls, switches, VPNs, and related systems in a hybrid on-premises and cloud environment
  • Administer, maintain, and optimize security tools such as endpoint protection, vulnerability management, SIEM, email security, identity and access management, and monitoring platforms
  • Monitor infrastructure and security events, investigate alerts, respond to incidents, and support remediation efforts
  • Partner with infrastructure and leadership teams to strengthen security controls across Microsoft technologies, including Active Directory, Azure, Microsoft 365, and related platforms
  • Support the company’s transition from traditional on-premises infrastructure to cloud-based solutions by helping design and implement secure architectures and best practices
  • Perform vulnerability assessments, patch management coordination, system hardening, and access reviews across servers, endpoints, and network devices
  • Develop and maintain security documentation, standards, procedures, and incident response processes
  • Assist with compliance, audit readiness, and security improvement initiatives
  • Collaborate with internal teams and third-party vendors to ensure reliable infrastructure performance and effective security coverage

Requirements

  • 5+ years of experience in infrastructure engineering, systems administration, network engineering, cybersecurity, or a related role
  • Strong hands-on experience with traditional server and network infrastructure, including Windows Server, virtualization, networking, firewalls, and enterprise environments
  • Experience administering and supporting security technologies such as SIEM, EDR, MFA, vulnerability scanning, email security, and log monitoring tools
  • Experience working within Microsoft environments, including Active Directory, Azure, Microsoft 365, Entra ID/Azure AD, Intune, and related services
  • Understanding of hybrid infrastructure security principles and cloud security best practices
  • Ability to monitor, analyze, and respond to security and infrastructure events in a fast-paced environment
  • Strong troubleshooting, documentation, and cross-functional communication skills

Nice to have

  • Experience supporting cloud transformation or migration initiatives from on-premises to Azure or other cloud platforms
  • Familiarity with zero trust concepts, identity security, conditional access, and security baselines within Microsoft environments
  • Exposure to compliance frameworks, audit support, and security governance practices
  • Relevant certifications such as Security+, CISSP, Microsoft security certifications, Azure certifications, or similar are a plus

What we offer

  • Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance
  • Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan
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