Sr Network Systems Engineer

ABOUT THIS POSITION Waystar is seeking an experienced Senior Network Engineer to design, implement, secure, and support a complex multi-site enterprise network infrastructure. This role will serve as a senior technical resource responsible for network architecture, security, performance optimization, and strategic modernization initiatives across corporate offices, data centers, and cloud-connected environments.

The ideal candidate will possess deep expertise in enterprise routing and switching, VPN technologies, firewall administration, network access control (NAC), and Zero Trust Network Architecture (ZTNA). This individual will help maintain secure, resilient connectivity while driving modernization efforts that improve scalability, supportability, and the end-user experience. WHAT YOU'LL DO Network Architecture & Engineering   Design, implement, and   maintain   enterprise network infrastructure across multiple locations.

Develop scalable architectures supporting on-premises, cloud, and hybrid environments. Lead network modernization initiatives focused on resiliency, security, and operational efficiency. Evaluate networking technologies and recommend standards aligned with business and security requirements. Create and   maintain   network diagrams, configuration standards, runbooks, and technical documentation. Routing, Switching & Wireless   Administer enterprise routing, switching, and wireless platforms.

Configure and support Layer 2 and Layer 3 networking services, including VLANs, routing protocols, redundancy, and QoS. Perform capacity planning, performance tuning, and lifecycle management of network infrastructure. Firewall   & Security Engineering   Design, implement, and manage enterprise   firewall   platforms and network security controls. Develop segmentation strategies, access policies, and least-privilege connectivity models.

Partner with cybersecurity teams to investigate threats, remediate vulnerabilities, and improve security posture. Review and implement   firewall   rule changes   in accordance with   change management standards. VPN & Secure Remote Access   Design and support site-to-site, client-based, and remote-access VPN solutions. Troubleshoot secure connectivity for employees, contractors, partners, and third-party integrations.

Optimize   remote access services for security, performance, reliability, and user experience. Network Access Control (NAC)   Administer and enhance Network Access Control solutions. Develop policies for device authentication, posture validation, onboarding, and dynamic segmentation. Integrate NAC capabilities with identity, endpoint management, and security platforms. Support secure access for corporate, BYOD, contractor, and partner devices.

Zero Trust Network Architecture (ZTNA)   Lead the design and adoption of Zero Trust networking principles and technologies. Implement   identity-aware access, segmentation, continuous validation, and least-privilege controls. Partner with security, endpoint, identity, and cloud teams to expand ZTNA capabilities. Develop roadmaps that advance secure access and reduce reliance on traditional network trust boundaries.

Operations, Incident Response & Leadership   Serve as an escalation point for complex network incidents, outages, and performance issues. Participate in on-call rotation, major incident response, root cause analysis, and corrective action planning. Plan and execute changes using established change management and maintenance processes. Provide technical leadership and mentorship to engineers and collaborate across infrastructure, security, cloud, and application teams.

WHAT YOU'LL NEED Bachelor's degree in Information Technology , Computer Science, Engineering, or equivalent practical experience. 8+ years of enterprise network engineering experience, including 5+ years supporting large-scale, multi-site environments. Advan