Sameer S

About Sameer S

Sr. Network Engineer with over 6 years of hands-on expertise designing, deploying, and securing enterprise and MSP network infrastructures. My work focuses on building highly available, scalable, and secure hybrid environments across on-premises and cloud platforms.I have deep technical experience with Cisco (Catalyst, Nexus, ASA, Firepower), Juniper (MX, EX), Palo Alto (PA Series, Panorama), and Fortinet (FortiGate 100F/300E) firewalls. My skill set spans routing and switching (BGP, OSPF, EIGRP, VRF, STP), VPN/IPsec, SD-WAN, and wireless technologies, ensuring seamless network connectivity and business continuity.In security and automation, I’ve managed next-generation firewalls, SSL decryption, rulebase audits, and Zero Trust access with RADIUS/TACACS+ and Cisco ISE. I also bring experience in F5 BIG-IP LTM/GTM load balancing, IPAM/DNS/DHCP (Infoblox, BlueCat), and network monitoring tools like SolarWinds, LogicMonitor, and Splunk for proactive performance and threat visibility.Cloud networking is another area I’m passionate about — I’ve worked on AWS (VPCs, Transit Gateways, VPNs) and Azure VNets/ExpressRoute integrations, ensuring secure connectivity between on-prem and cloud workloads.I enjoy problem-solving, optimizing network performance, and automating repetitive tasks using Python, REST APIs, and Ansible, which help streamline configuration, compliance, and reporting.Always eager to evolve with modern infrastructure trends, I’m currently focused on expanding my expertise in Zero Trust, Prisma Access, SD-WAN, and Cloud Network Automation.

Experience

1. Senior Network Engineer

   Unisys

   Nov 2024 — Present

   Lead the deployment, configuration, and management of Fortinet FortiGate and Cisco FTD firewalls in HA clusters, strengthening security posture and ensuring failover reliability.Troubleshoot complex routing, VPN, and firewall issues, minimizing downtime and maintaining enterprise connectivity.Collaborate with AWS teams to integrate VPCs and Direct Connect, enabling secure and optimized hybrid cloud networking.Administer Juniper MX/EX and Cisco Catalyst switches, ensuring stable LAN/WAN operations across multiple sites.Manage F5 BIG-IP LTM, BlueCat IPAM, and authentication, improving application availability, IP management, and secure access.Leverage Python, Wireshark, and SolarWinds to automate tasks, monitor performance, and proactively prevent network issues.

Education

• University of Houston

  Master of Science - MS