Network Support Lead - L3 (Onsite)

Network Support Lead (L3) We are seeking an experienced Network Support Lead (L3) to provide advanced technical leadership and serve as the final escalation point for complex network issues. This role involves troubleshooting, architecture support, firewall management, performance optimization, and mentoring junior engineers. If you thrive in high-pressure environments and have a passion for network design and security, we want to hear from you. Key Responsibilities Advanced Troubleshooting & Escalation Act as the final L3 escalation for complex issues involving OSPF, BGP, VLANs, STP, port channels, NAT, ACLs, and VPNs. Perform deep packet analysis using Wireshark, FortiAnalyzer, Syslog to resolve persistent or high-severity issues. Lead and manage bridge calls during P1 / P2 network incidents. Network Design & Architecture Support Contribute to HLD / LLD for new sites, migrations, segmentation, and firewall architecture. Review and validate network designs for scalability, security, and standards compliance. Recommend improvements to routing, switching, and security architectures. Firewall & Security Operations Manage and optimize Fortinet FortiGate firewalls, including policies, NAT, UTM profiles, SSL / IPSec VPNs, routing, and HA clusters. Audit Firewall Access Control Policies for compliance and least-privilege access. Participate in security hardening and segmentation strategies. Network Optimization & Performance Engineering Conduct capacity planning, traffic analysis, and performance tuning. Monitor device health, routing tables, CPU / memory usage, and optimize configurations. Identify chronic issues and implement preventive measures. Network Automation & Scripting Develop automation for routine tasks using Python, Bash, or EEM scripting (preferred). Automate configuration backups, compliance checks, and monitoring integrations. Change Management & Migrations Lead complex network changes, major upgrades, firewall migrations, and routing redesigns. Prepare RFCs, rollback plans, impact assessments, and post-implementation reports. Coordinate network cutovers with application, infrastructure, and ISP teams. Vendor & ISP Coordination Collaborate with ISPs and OEMs (Cisco, Fortinet) for link issues, hardware faults, and TAC cases. Validate circuit performance and troubleshoot last-mile connectivity. Documentation & Knowledge Management Maintain network topology diagrams, design documents, SOPs, and configuration baselines. Enhance L1 / L2 documentation and ensure compliance with standards. Mentorship & Technical Leadership Mentor L1 / L2 engineers in routing / switching, firewall operations, and troubleshooting. Recommend technical training and assist in defining operational standards. Required Technical Skills Deep hands-on experience with Cisco IOS / XE, routing protocols (OSPF, BGP), switching (VLANs, STP, EtherChannel). Strong expertise with Fortinet FortiGate (FortiOS) : policies, NAT, HA, UTM, VPN, routing, diagnostics. Proficiency in NAT, ACLs, IPSec / SSL VPN, segmentation strategies. Experience with NMS / SNMP monitoring, Syslog analytics, and packet capture tools. Working knowledge of automation / scripting (Python, EEM, Bash). Knowledge of network security best practices and compliance requirements. Experience & Certifications Experience : 10–12 years in networking, with 3–4 years in L3-level support or senior escalation roles. Certifications : Cisco CCNP Enterprise (strongly preferred; CCNA mandatory) Fortinet NSE 4 (higher NSE levels preferred) ITIL v4 Foundation (optional but beneficial) Additional routing / firewall / security certifications are a plus. Behavioral Competencies Excellent analytical and troubleshooting skills with a structured approach. Ability to lead high-severity incident bridges and communicate clearly with stakeholders. Strong documentation, planning, and coordination abilities. Proactive, self-driven, and committed to automation and continuous improvement. Collaborative with strong mentoring and knowledge-sharing mindset. What Makes HTC A Great Place To Build Your Future HTC Global Services wants you to join our team. Come build new things with us and advance your career. At HTC Global, you’ll collaborate with experts, work alongside clients, and be part of high-performing teams driving success together. You’ll have long-term opportunities to grow your career and develop skills in the latest emerging technologies. At HTC Global Services, our employees have access to a comprehensive benefits package. Benefits can include Group Health (Medical, Dental, and Vision), Paid Time Off, Paid Holidays, 401(k) matching, Group Life and Disability insurance, Professional Development opportunities, Wellness programs, and a variety of other perks. Our success as a company is built on inclusion and diversity. HTC Global Services is committed to providing a workplace free from discrimination and harassment, where every employee is treated with dignity and respect. We celebrate differences and believe that diverse cultures, perspectives, and skills drive innovation and success. HTC is an Equal Opportunity Employer and a proud National Minority Supplier. We seek to empower each individual, fostering an environment where everyone feels valued, included, and respected. #LI-NC1 #LI- Onsite