Senior IT Infrastructure & Network Engineer

Paylocity; Mount Prospect (IL); On-site; USD 120,000 - 170,000; Full time

Benefits offered by this job

Competitive Salary

401K match

Health insurance

Paid holidays

PTO

Job summary

Paylocity is seeking an onsite Tier 3 Senior Systems & Network Engineer to serve as the highest escalation point for infrastructure, system, and network issues. You will maintain, support, and improve server, network, and endpoint infrastructure while designing and deploying new solutions to support business growth and modernization.

You will own and evolve the organization’s network infrastructure, including firewalls, routers, switches, VLANs, and VPNs, and manage Windows Server environments,

Qualifications

• Bachelor’s degree in Information Technology, Computer Science, or related field preferred.
• 5+ years of experience in IT infrastructure, systems administration, or network engineering.
• Strong experience with Windows Server (2016/2019/2022) environments.
• Advanced knowledge of Active Directory, DNS, DHCP, and Group Policy.
• Strong networking experience including switches, routers, VLANs, VPNs, and firewalls – required.
• Experience troubleshooting both server and network infrastructure issues.
• Experience with virtualization (Hyper‑V or VMware).
• Hands‑on experience with Microsoft Azure and hybrid cloud environments – required.
• Proficiency with endpoint management tools, specifically Microsoft Intune – required.
• Experience with infrastructure monitoring platforms such as Zabbix, or willingness to learn.
• Experience supporting and maintaining line‑of‑business applications, including patching and vendor coordination.
• Strong problem‑solving and analytical skills.
• Ability to mentor and support Tier 1 and Tier 2 technicians.
• Certifications such as CCNA, Microsoft certifications (Azure, Intune), or equivalent preferred.

Responsibilities

• Act as the highest escalation point for infrastructure, system, and network issues
• Maintain, support, and continuously improve existing server, network, and endpoint infrastructure
• Engineer and deploy new infrastructure solutions from design through implementation, aligned with business growth and modernization goals
• Own and evolve the organization’s network infrastructure — including firewalls, routers, switches, VLANs, and VPNs — both maintaining current environments and designing improvements
• Troubleshoot and resolve complex technical issues across servers, endpoints, and network systems
• Manage and maintain Windows Server environments and Active Directory infrastructure
• Monitor system and network performance using platforms such as Zabbix; deploy and manage infrastructure monitoring and alerting solutions
• Architect and lead deployment of new infrastructure solutions aligned with business growth and modernization goals
• Own and administer Microsoft Azure and hybrid cloud environments
• Deploy, manage, and maintain endpoint environments using Microsoft Intune
• Support and maintain line-of-business applications, including patching, updates, and vendor coordination
• Support virtualization environments and ensure system availability and performance
• Assist with infrastructure projects, including migrations, deployments, and integrations
• Provide technical guidance and escalation support to Tier 1 and Tier 2 teams
• Maintain technical documentation, network diagrams, and system procedures
• Ensure security best practices, patch management, and system hardening standards are followed
• Evaluate and recommend new technologies to improve infrastructure efficiency and reliability

Skills

Windows Server

Active Directory

DNS

DHCP

Group Policy

Network engineering

Firewalls

VPNs

Azure

Intune

Zabbix

Hyper-V

VMware

Education

Bachelor’s degree in IT/CS or related

Tools

Hyper-V

VMware

Zabbix

Azure

Intune

Job description

Paylocity is seeking an onsite Tier 3 Senior Systems & Network Engineer to serve as the highest escalation point for infrastructure, system, and network issues. You will maintain, support, and improve server, network, and endpoint infrastructure while designing and deploying new solutions to support business growth and modernization.

You will own and evolve the organization’s network infrastructure, including firewalls, routers, switches, VLANs, and VPNs, and manage Windows Server environments,