Senior Network Support Engineer Jobs in Chicago, IL

Essential Duties and Responsibilities

Network Infrastructure:

• Monitor and manage LAN, WAN, and intranet network architectures to ensure reliable, secure, and scalable connectivity across all company locations.
• Maintain and troubleshoot network hardware including routers, switches, firewalls, load balancers, VPN concentrators, and wireless access points.
• Monitor network performance, availability, and security using industry-standard tools; proactively identify and resolve issues before they impact operations.
• Plan and execute network upgrades, expansions, and migrations with minimal disruption to business operations.
• Manage IP addressing, DNS, DHCP, and other core network services.
• Create and maintain comprehensive network documentation, including topology diagrams, configuration standards, and change management records.

Server Virtualization and Cloud:

• Administer and maintain server virtualization environments using VMware vSphere/ESXi and Microsoft Hyper-V, including provisioning, performance tuning, and capacity planning.
• Manage and support Microsoft Azure cloud infrastructure, including virtual networks, resource groups, storage accounts, and Azure Active Directory integrations.
• Plan and execute virtual machine migrations, snapshots, backups, and disaster recovery procedures across on-premises and cloud environments.
• Monitor virtualization host health, resource utilization, and storage performance to ensure optimal availability and scalability.

Identity, Access, and Security:

• Implement and manage Single Sign-On (SSO) solutions to streamline user authentication across enterprise applications and services.
• Deploy, configure, and administer Cisco Duo multi-factor authentication (MFA) to enforce secure access policies across the organization.
• Develop and enforce network security policies and procedures, including firewall rules, access control lists (ACLs), intrusion detection/prevention systems (IDS/IPS), and VPN configurations.
• Manage Azure Active Directory and on-premises Active Directory integration, conditional access policies, and identity governance.
• Ensure compliance with industry standards and regulatory requirements relevant to network infrastructure and data protection.

Collaboration and Support:

• Collaborate with cross-functional teams including application development, systems administration, and security to assess network requirements and deliver integrated solutions.
• Respond to and resolve network-related incidents and service requests in a timely manner; participate in on-call rotation as needed.
• Evaluate emerging networking and virtualization technologies and make recommendations for adoption to improve performance, reliability, and cost-efficiency.
• Provide technical mentorship and guidance to other IT staff on networking and workstation support escalations.

Education:

• Bachelor’s degree in Computer Science, Information Technology, Network Engineering, or a related field; or equivalent combination of education and experience.

Experience:

• Minimum 5 years of experience in network engineering, administration, or a related role in a mid-to-large enterprise environment.
• Hands-on experience with enterprise-grade routing and switching platforms (e.g., Cisco, Meraki, Arista).
• Demonstrated experience designing and supporting multi-site WAN architectures, including MPLS, SD-WAN, and site-to-site VPN solutions.
• Proven experience administering VMware vSphere/ESXi and Microsoft Hyper-V virtualization platforms in production environments.
• Experience deploying and managing Microsoft Azure services, including Azure AD, virtual networking, and hybrid cloud connectivity.
• Hands-on experience implementing and supporting SSO and Cisco Duo MFA solutions.
• Experience in manufacturing, printing, or industrial business environments is strongly preferred.

Technical Skills:

• Strong proficiency with routing protocols (BGP, OSPF, EIGRP) and switching technologies (VLANs, STP, port-channel, QoS).
• In-depth knowledge of VMware vCenter, ESXi host management, vMotion, and distributed resource scheduling (DRS).
• Proficiency with Microsoft Hyper-V Manager, failover clustering, and virtual machine replication.
• Working knowledge of Microsoft Azure portal, Azure networking, Azure AD Connect, and conditional access policies.
• Familiarity with SSO protocols and standards (SAML, OAuth 2.0, OpenID Connect) and Duo MFA administration and policy configuration.
• Experience with network security technologies including next-generation firewalls, IDS/IPS, NAC, and endpoint security integration.
• Working knowledge of network monitoring and management tools (e.g., SolarWinds, PRTG, Nagios, Wireshark).
• Knowledge of automation and scripting for network and infrastructure operations (PowerShell, Python, Ansible, or similar).

Benefits:

We offer a comprehensive benefits package including Health, Dental, Vision, 40lK and wellness benefits.