<p>Our client is seeking an experienced <strong>Infrastructure Security Engineer</strong> 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. Based on general knowledge.</p><p><br></p><p><strong>Key Responsibilities</strong></p><ul><li>Manage and secure core infrastructure, including servers, networks, firewalls, switches, VPNs, and related systems in a hybrid on-premises and cloud environment. Based on general knowledge.</li><li>Administer, maintain, and optimize security tools such as endpoint protection, vulnerability management, SIEM, email security, identity and access management, and monitoring platforms. Based on general knowledge.</li><li>Monitor infrastructure and security events, investigate alerts, respond to incidents, and support remediation efforts. Based on general knowledge.</li><li>Partner with infrastructure and leadership teams to strengthen security controls across Microsoft technologies, including Active Directory, Azure, Microsoft 365, and related platforms. Based on general knowledge.</li><li>Support the company’s transition from traditional on-premises infrastructure to cloud-based solutions by helping design and implement secure architectures and best practices. Based on general knowledge.</li><li>Perform vulnerability assessments, patch management coordination, system hardening, and access reviews across servers, endpoints, and network devices. Based on general knowledge.</li><li>Develop and maintain security documentation, standards, procedures, and incident response processes. Based on general knowledge.</li><li>Assist with compliance, audit readiness, and security improvement initiatives. Based on general knowledge.</li><li>Collaborate with internal teams and third-party vendors to ensure reliable infrastructure performance and effective security coverage. Based on general knowledge.</li></ul>
<p>We are looking for an experienced IT Security Engineer – Zscaler Specialist to support and strengthen enterprise cloud security operations in Chicago, IL. This Long-term Contract position focuses on administering and enhancing Zscaler-based security services while helping maintain a reliable, scalable, and well-governed security environment. The role will partner with cross-functional teams to evaluate requirements, resolve technical issues, and improve secure access, web protection, and data safeguarding capabilities.</p><p><br></p><p>Responsibilities:</p><p>• Administer and optimize Zscaler security platforms to support secure, high-performing access across cloud and enterprise environments.</p><p>• Investigate configuration issues, analyze service behavior, and implement corrective actions to maintain stable security operations.</p><p>• Collaborate with infrastructure, network, and application teams to align security controls with business needs and technical requirements.</p><p>• Support secure web access, zero trust connectivity, firewall policy coordination, and data protection initiatives across the environment.</p><p>• Conduct reviews of existing processes and technical documentation to identify gaps, recommend improvements, and strengthen operational consistency.</p><p>• Translate business and security needs into clear technical requirements, user stories, and actionable implementation plans in Agile delivery settings.</p><p>• Participate in troubleshooting efforts, root cause analysis, and service improvement activities to reduce risk and enhance platform performance.</p><p>• Assist with documentation updates, control validation, and ongoing analysis related to security changes, policies, and operational procedures.</p>
We are looking for an experienced Network Engineer to support enterprise networking and security initiatives in Schaumburg, Illinois. This Long-term Contract position focuses on designing, administering, and optimizing secure network environments across firewall, wireless, and cloud-managed platforms. The role requires a hands-on, detail-oriented individual who can strengthen connectivity, improve visibility, and help deliver infrastructure changes with minimal disruption.<br><br>Responsibilities:<br>• Administer and enhance network security platforms using Fortinet solutions, including firewall, endpoint access, and analytics tools.<br>• Manage Aruba-based switching, wireless, and centralized management environments to maintain reliable campus and branch connectivity.<br>• Plan and execute secure connectivity updates, including IPsec-related changes, pilot deployments, and production implementations.<br>• Integrate network and security systems with identity services such as Active Directory and Entra ID to support controlled access.<br>• Oversee certificate usage and lifecycle processes to help maintain trusted authentication across network services.<br>• Monitor logs, generate operational reporting, and troubleshoot issues spanning firewalls, routing, wireless, and security infrastructure.<br>• Create and maintain technical documentation, including standard procedures, operational runbooks, and knowledge transfer materials.<br>• Collaborate with technical teams to support cloud-managed networking and security platforms while improving performance and resilience.