(1117415) Network Security Engineer

Diversified Services Network; Nashville (TN); On-site; USD 90,000 - 95,000; Full time

Benefits offered by this job

401(k)

Dental insurance

Vision Insurance

Disability insurance

Employee assistance program

Health insurance

Health savings account

Life insurance

Paid time off

Paid Holidays

Job summary

Diversified Services Network, Inc. (DSN) is seeking a full-time Network Security Engineer to join our team in Nashville, TN. The role blends hands-on operational support with strategic security projects to strengthen the organization’s posture and keep critical services secure.

Responsibilities include NAC governance with Cisco ISE, firewall policy management, and coordination with product owners to deploy, maintain, and improve security controls across the enterprise.

Qualifications

• Bachelor's degree in Cybersecurity, Security Engineering/ Architecture, Computer Science, or related field, or equivalent experience.
• 5–7 years of relevant experience.
• Hands-on experience with Cisco ISE and firewall policy management.

Responsibilities

• Provide daily operational support and maintenance for network and firewall policy services.
• Perform NAC governance activities using Cisco ISE.
• Execute network improvements and risk reduction initiatives including segmentation and hardware refresh.
• Manage application protection and proxy policy activities.
• Collaborate with internal partners to troubleshoot firewall, cloud policy, and other products.
• Conduct testing and QA for changes and deployments prior to production.
• Assist Product Owners in resolving technical matters and supporting firewall policy and network posture.

Skills

Cybersecurity best practices

Internal network management

Firewall management

Cisco ISE

Customer service

Education

Bachelor's degree or equivalent experience

Job description

Network Security Engineer

Full-Time | Onsite, 5 Days per Week

Diversified Services Network, Inc. (DSN) is seeking a full-time Network Security Engineer to join our team in your choice of our Dallas, TX, Nashville, TN, or East Peoria, IL office locations. We offer full benefits, PTO, 401k, and more! If you're looking to grow your career within an extremely reputable, stable Fortune 100 company - let's talk!

Position Overview

The Network Security Engineer will join a team that delivers network security service offerings across a global enterprise environment. This role blends hands‑on operational support with project work aimed at strengthening the organization's overall security posture, keeping critical services secure, reliable, and continuously improving.

Key Responsibilities

• Provide daily operational support and maintenance for the team's network and firewall policy service offerings and the products that deliver them.
• Perform Network Access Control (NAC) governance activities using Cisco ISE.
• Execute network improvement and risk reduction initiatives, including network segmentation, application protection, and hardware refresh projects.
• Manage application protection and proxy policy activities.
• Partner with internal process partners to troubleshoot and resolve technical issues across firewall, cloud policy, and other supported products.
• Conduct testing and quality assurance for changes and new process deployments prior to production release.
• Assist Product Owners in resolving technical matters and in implementing, maintaining, and supporting the technical and process elements of firewall policy, network posture, and the team's web-based portal.

Qualifications

Education & Experience

• Bachelor's degree in Cybersecurity, Security Engineering/Architecture, Computer Science, or a related field, or equivalent experience.
• 5–7 years of relevant experience.

Required Technical Skills

• Working knowledge of cybersecurity network best practices.
• Working knowledge of internal network management and data/traffic flows.
• Solid knowledge of firewall management and network protocols.
• Functional, hands‑on experience with Cisco ISE.

Required Soft Skills

• Advanced customer service skills.

• 401(k)

• Dental insurance
• Vision Insurance
• Disability insurance
• Employee assistance program
• Health insurance
• Health savings account
• Life insurance
• Paid time off
• Paid Holidays

Salary expectations: 90,000-95,000 per annual