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Network Security Engineer III

Job in Quincy, Norfolk County, Massachusetts, 02171, USA
Listing for: Granite Telecommunications
Full Time position
Listed on 2026-02-07
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer
Job Description & How to Apply Below

Direct message the job poster from Granite Telecommunications

Corporate Technology Recruiter @ Granite Telecommunications | Technical Recruiting

General Summary of Position:

We are seeking a highly skilled and motivated Network Security Engineer III to join our team. The successful candidate will be responsible for designing and building complex multi-vendor network solutions to support our North American business customers and maintain our core infrastructure. This role requires in-depth knowledge of various network technology and vendor implementations including Fortinet, Cisco. The ideal candidate will have strong expertise in routing protocol design, security, sd-wan implementations, and comprehensive documentation skills.

Duties and Responsibilities:

  • Design, implement, and maintain complex multi-vendor network solutions for business customers.
  • Collaborate with cross-functional teams to assess network requirements and develop appropriate solutions.
  • Configure and troubleshoot network devices, including routers, switches, firewalls, and other network appliances.
  • Develop, maintain, iterate and improve internal reference architecture.
  • Ensure network security by implementing and managing firewalls, VPNs, and other security measures.
  • Develop and maintain detailed network documentation, including design diagrams, configuration guides, and standard operating procedures.
  • Monitor network performance, identify issues, and implement solutions to optimize network efficiency.
  • Provide technical support and guidance to customers and internal teams.
  • Stay updated with the latest industry trends and technologies to ensure network solutions are current and effective.
  • Participate in on-call rotations and respond to network emergencies as needed.
  • Operate and maintain vendor specific core infrastructure including tracking licensing, tracking, planning and conducting firmware upgrade.

Required Qualifications:

  • Minimum of 5-8 years of experience in network and security engineering.
  • Proficiency in designing and implementing network solutions using vendors such as Fortinet, Cisco.
  • Strong understanding of routing protocols (e.g., BGP, OSPF) and VPN tunnels.
  • Experience with network security principles and practices, including firewalls, VPNs, and intrusion detection/prevention systems.
  • Excellent troubleshooting and problem-solving skills.
  • Ability to create and maintain detailed network documentation.
  • Strong communication skills and ability to work effectively in a team environment.
  • Experience with Network Automation/Dev Ops including familiarity with Python, CI/CD tools and scripting large deployments/complex changes.
  • Relevant certifications such as NSE 7, CCNP, or equivalent.
  • Experience in a customer-facing role, providing technical support and solutions.
  • Experience operating hypervisors, on prem and in the cloud.
  • Experience operating the Fortinet product suite:
    Fortimanager, Fortianalyzer, etc.

Preferred Qualifications:

  • Preferred 8-12 years of experience in network and security engineering.
  • Extensive familiarity with the Fortinet product offering.
  • Experience operating and maintaining data center grade Fortinet equipment, experience planning and conducting upgrade cycles for Fortinet equipment.
  • Experience at Managed Service Providers that support Fortinet.
  • Advanced certifications such as Fortinet NSE 7, CCIE, JNCIP or equivalent.
  • Experience with multi-cloud networking (MCN), unified SASE and network function virtualization (NFV).
  • Knowledge of wireless networking technologies and solutions.
Seniority level
  • Seniority level

    Mid-Senior level
Employment type
  • Employment type

    Full-time
Job function
  • Job function

    Information Technology
  • Industries Telecommunications

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Inferred from the description for this job

Medical insurance

Vision insurance

401(k)

Student loan assistance

Tuition assistance

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