Network Security Engineer

About Flexgen

Based in Durham, N.C., FlexGen is an innovative software and services provider in the global energy storage sector. At the forefront of the energy transition, FlexGen leverages decades of engineering and software expertise to help shape the future of sustainable power both in the United States and globally. FlexGen's HybridOS™ software seamlessly integrates with any hardware vendor and with both traditional and renewable power sources. Our advanced analytics and AI-driven insights enable energy storage owners to effectively deploy diverse power market strategies and integrate various generation forms, enhancing grid stability and increasing economic returns. With 1.5M hours of runtime and 8 GWh of energy storage systems managed with HybridOS™, FlexGen provides field-tested software and services solutions that are trusted by the most technically and commercially demanding developers, utilities, government agencies, and industrial companies in the world.

Position Description:

As a member of FlexGen's Cybersecurity team, the Network Security Engineer will be responsible for designing, implementing, and maintaining the network infrastructure that supports and protects FlexGen's corporate network and its broader cloud infrastructure. This position will work closely with Compliance, DevOps, and IT teams to ensure secure and reliable connectivity between devices and systems, both on-site and in cloud environments. FlexGen maintains a Zero Trust Network Access (ZTNA) architecture, and this role will be instrumental in advancing and maturing its capabilities.

Major Job Responsibilities:

• Design, implement, and maintain network infrastructure to support and protect FlexGen's corporate and cloud environments
• Advance and mature FlexGen's Zero Trust Network Access (ZTNA) architecture, ensuring secure connectivity for users and systems
• Serve as the networking subject matter expert for teams involved in the secure and reliable integration of devices, software, and cloud infrastructure
• Configure, manage, and troubleshoot Fortinet products (FortiGate, FortiSwitch, FortiAP) and related networking components
• Implement and manage VPN solutions (IPsec site-to-site, SSL VPN) for secure remote access and site connectivity
• Create and maintain detailed network diagrams to document infrastructure design and changes
• Serve as the escalation point for networking related incidents and outages, troubleshooting and documenting events as they arise
• Ensure the compliance of FlexGen's network infrastructure with cybersecurity best practices and contribute to policy development and implementation
• Technologies you should know:
• Fortinet product suite (FortiGate, FortiSwitch, FortiAP)
• ZTNA platforms (Cato Networks, Zscaler)
• Cloud networking and security fundamentals (Azure, AWS)
• VPN technologies (IPsec site-to-site, SSL VPN)
• Access Control Lists (ACLs), Virtual Routing and Forwarding (VRFs), and VLANs
• Linux operating systems and command line interface (CLI)
• Penetration testing tools (e.g., Kali Linux)
• Network monitoring and troubleshooting tools (e.g., Wireshark, ping, traceroute)

Position Requirements:

• CCNA certification or equivalent hands-on network engineering experience
• Two-year degree in IT, Computer Science, Networking, or a related field preferred
• Minimum of 3-5 years of experience in network design, implementation, and troubleshooting
• Experience creating detailed network diagrams
• Proficiency in direct CLI configuration of network devices
• Background implementing cybersecurity best practices on network infrastructure
• Familiarity with ZTNA concepts and architecture
• Capability to investigate and resolve network connectivity issues and security incidents
• On-call availability, primary contact for networking, sometimes during off-hours

FlexGen provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability or genetics. In addition to federal law requirements, FlexGen complies with applicable state and local laws governing nondiscrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training. 

FlexGen expressly prohibits any form of workplace harassment based on race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, genetic information, disability, or veteran status. 

To the extent permitted by law, employees are subject to periodic random drug testing, and post-accident and reasonable suspicion drug and alcohol testing.