Network Security Engineer Jobs in Missouri (NOW HIRING)

Job Title

Senior Network Engineer

Job Description Summary

Cushman & Wakefield is seeking a highly motivated Senior Network Engineer to focus on delivering the new Zero Trust Security standards to our Branch offices, Data Centers and Cloud environments.

Job Description

Responsibilities

• Design, implement, and support enterprise network services across LAN, WAN, SD-WAN, VPN, routing, switching, wireless, firewalls, and secure remote access.
• Provide senior hands-on engineering expertise across Fortinet, Palo Alto, Silver Peak, Cisco branch and data centre networking, and zero trust controls, ensuring solutions are scalable, supportable, and aligned to enterprise standards.
• Translate platform standards and architectural direction into detailed designs, build configurations, and implementation plans.
• Deliver engineering outcomes across branch, campus, edge, cloud, and Azure networking, including integration with VMware-hosted workloads.
• Own key engineering activities including network lifecycle management, capacity and resilience planning, service optimization, and remediation.
• Lead complex changes, migrations, and deployments such as SD-WAN transformations, branch refresh programmes, firewall and segmentation changes, and cloud connectivity enablement.
• Provide Level 4 escalation support for major incidents and complex technical issues, including deep troubleshooting, root cause analysis, recovery planning, and vendor engagement.
• Drive continuous improvement in network and security services through standardization, reliability improvements, documentation, and knowledge transfer.
• Work closely with security teams, operations teams, and managed service providers to ensure services are delivered securely, transitioned effectively, and operated to agreed standards.
• Travel to project sites, offices, data centres, and partner locations as required to support assessments, implementation activity, cutovers, stakeholder engagement, and critical go-live or remediation work.

General Network Operations & Engineering

• Support the design, planning, implementation, and continuous improvement of secure, scalable, and high-performing network services.
• Maintain global network performance, availability, integrity, and security to enterprise standards.
• Contribute to data centre, cloud and core infrastructure networking, lifecycle planning, upgrade strategies, and service roadmaps.
• Contribute to, produce, and maintain processes, procedures, operational and architectural documentation, that meet CIO/CTO Standards.
• Participate in global engineering initiatives and cross-functional working groups.

Required Skills

• Deep hands-on experience with Cisco enterprise networking and wireless, including Cisco ISE as an authentication backend, and Fortinet firewall, switching, wireless, and SD-WAN, including design and support of corporate wireless environments.
• Strong expertise in Layer 2 / Layer 3 networking, including routing protocols such as BGP, OSPF, and EIGRP, plus high availability and segmentation design.
• Extensive experience with SD-WAN technologies, particularly Silver Peak and Fortinet SD-WAN, including design, migration, implementation, optimisation, and support.
• Strong experience in network security and zero trust models, including firewall policy design, segmentation, secure access models, and Zscaler (ZIA, ZPA, ZDX) or equivalent SASE platforms.
• Experience with Azure networking, including hybrid connectivity, segmentation, and Virtual WAN Hub, alongside networking integration with VMware environments.
• Good knowledge of monitoring and observability platforms such as SolarWinds, and strong understanding of incident, problem, and change management in large enterprise environments.
• Experience with automation and infrastructure-as-code, using tools such as Python, Ansible, JSON, Jinga2 or YAML.

Additional Skills

• Strong troubleshooting and analytical capability across complex enterprise environments.
• Ability to manage multiple priorities in a fast-paced global setting.
• Clear communication, stakeholder engagement, and mentoring capability.
• Strong focus on delivery, ownership, and service reliability.

Technology Stack (Relevant Exposure)

• Cisco (routing, switching, wireless, Nexus, Meraki, ISE)
• Fortinet (firewalls, SD-WAN, switching, wireless)
• Zscaler (ZIA, ZPA, ZDX)
• Silver Peak SD-WAN
• Azure Networking and Virtual WAN Hub
• VMware, F5 (desirable), and SolarWinds or equivalent monitoring platforms

Person Specification

• 10+ years of experience in enterprise networking, SD-WAN, and network security engineering.
• Strong hands-on experience delivering complex network solutions in large enterprise environments.
• Proven ability to diagnose and resolve high-severity technical issues.
• Experience working in globally distributed teams.
• Willingness and ability to travel as needed for project delivery, site engagement, implementation support, and major change activity across regional and global locations.

Certifications (Preferred):

• Cisco CCNA / CCNP / CCIE
• Fortinet NSE (or equivalent)
• ITIL Foundation

Desirable:

• Advanced networking or security certifications
• Automation and scripting experience
• Knowledge of ISO27000 or similar security frameworks

Cushman & Wakefield also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health, vision, and dental insurance, flexible spending accounts, health savings accounts, retirement savings plans, life, and disability insurance programs, and paid and unpaid time away from work. In addition to a comprehensive benefits package, Cushman and Wakefield provide eligible employees with competitive pay, which may vary depending on eligibility factors such as geographic location, date of hire, total hours worked, job type, business line, and applicability of collective bargaining agreements.
The compensation that will be offered to the successful candidate will depend on factors such as whether the position is covered by a collective bargaining agreement, the geographic area in which the work will be performed, market pay rates in that area, and the candidate's experience and qualifications.
The company will not pay less than minimum wage for this role.
The compensation for the position is: $ 102,000.00 - $120,000.00Cushman & Wakefield is an Equal Opportunity employer to all protected groups, including protected veterans and individuals with disabilities. Discrimination of any type will not be tolerated.

In compliance with the Americans with Disabilities Act Amendments Act (ADAAA), if you have a disability and would like to request an accommodation in order to apply for a position at Cushman & Wakefield, please call the ADA line at 1-888-365-5406 or emailAccommodations@cushwake.com. Please refer to the job title and job location when you contact us.

INCO: "Cushman & Wakefield"