Md Saidur R.

Network & security engineer with 8+ years building and securing networks for government, university and infrastructure projects: data centers, campus Wi-Fi 6, firewalls, VPNs and proactive monitoring. I've designed the DC/DR network for a government prepaid gas system, deployed a campus-wide network and Wi-Fi 6 for a public university, and on Upwork delivered 300+ hours building proactive monitoring for a B2B telecom provider's MikroTik customer routers. WHAT I CAN DO FOR YOU ✔ Firewalls: Fortinet, Sophos, Cisco (rules, NAT, HA, hardening) ✔ VPN: site-to-site IPSec, SSL VPN, secure remote access ✔ Network design & troubleshooting: LAN/WAN/WLAN, VLANs, routing, redundancy ✔ MikroTik / ISP: RouterOS configuration, monitoring and alerting at scale ✔ SOC & threat detection: SIEM/XDR (Wazuh, Stellar Cyber, CrowdStrike), vulnerability assessment ✔ AI-assisted automation: scripts that automate repetitive network and security tasks such as config backups, security audits, hardening checks and reports ✔ Data center: VMware ESXi, Dell servers, SAN/NetApp storage, DR planning CERTIFICATIONS CCNP Security · CCNA · EC-Council Certified SOC Analyst (CSA) · Huawei HCIP · Luna HSM HOW I WORK 1. Review your current setup and goals 2. Share a clear plan, timeline and rollback steps before any change 3. Implement, test, and hand over documentation (diagrams + configs) Send me a short description of your network and the problem, and I'll reply with what I'd check first.