Hire the Best Network Security Engineers in Dhaka, BD

I am a network security engineer with real-life professional experience. I have work experience with complex networking architecture.

I help businesses design, secure, troubleshoot, and optimize enterprise network and infrastructure environments. With 12+ years of hands-on experience in ISP, Data Center, Enterprise Networking, and Systems Administration, I have successfully deployed and managed Cisco, Palo Alto, MikroTik, VMware, Linux, and cloud-based infrastructure solutions for organizations of all sizes. My expertise includes Network Architecture, Network Security, Firewall Deployment, Routing & Switching, VMware Virtualization, Linux Administration, and Infrastructure Monitoring. I specialize in designing highly available, scalable, and secure environments that improve performance, reduce downtime, and support business growth. Core Expertise: ✔ Network Architecture & Design ✔ Network Security & Firewall Solutions (Palo Alto, Cisco ASA/FTD, pfSense, Sophos) ✔ Enterprise Routing & Switching (BGP, OSPF, EIGRP, MPLS) ✔ Data Center & ISP Network Infrastructure ✔ Cisco Nexus, Catalyst, ISR, ASR & Meraki ✔ MikroTik Routing, VPN, VLAN & Automation ✔ VMware vSphere, ESXi & Virtualization ✔ Linux System Administration (RHEL, CentOS, Ubuntu, Debian) ✔ AWS Networking & Cloud Infrastructure ✔ Monitoring & Observability (Zabbix, SolarWinds, Grafana, Prometheus, LibreNMS) ✔ Network Automation using Python ✔ Security Assessment (Wazuh, Nessus, Nmap, OpenVAS) ✔ SSL/TLS Certificate Deployment & Management (Commercial SSL, Let's Encrypt, Renewal & Troubleshooting) ✔ Linux Infrastructure & Services DNS (Primary DNS, Secondary DNS) Mail Servers (Zimbra, Postfix) Web Servers (Apache, Nginx) Hosting Platforms (WHM, cPanel, WordPress) FTP Services TACACS+ FreeRADIUS Samba File Services Whether you need a new network deployment, firewall migration, VPN implementation, BGP/MPLS troubleshooting, VMware infrastructure support, or security hardening, I can deliver reliable and business-focused solutions. Let's discuss how I can help strengthen and optimize your infrastructure.

✅ACI✅CCNP-S✅CCNA-RS✅CC(ISC)2✅JNCIA✅NSE1/2/3✅PANSE✅CCSA ✅ITIL ✅CISSO✅MCSA✅MTCNA✅10+ YEARS My subject matter expertise includes the following: ✅ Routing: BGP, EIGRP, OSPF, PBR HSRP, VRRP, VPC, Route-map/filtering, ACI. ✅ Switching: L2 & L3 switches. VLAN, VTP, VxLAN. ✅ VPN: GRE, Site-to-Site IPSEC, Remote VPN (AnyConnect, GlobalProtect, PPTP) ✅ WiFi: CISCO, UniFi, Netgear, Mikrotik, Cambium. ✅ Firewall: ACL, NAT, L-7 filtering, Content-Based Firewall, and HA Cluster. ✅ IPS/NGFW/NGTX: Vulnerability Protection, Anti Spyware, URL Filtering, Sandboxing. ✅ QoS: Network Quality Optimization, Queue Control, and Load Balancing. ✅ Web Proxy: Blue Coat, PFSense, Open-Source Squid+SquidGuard, Hotspot. ✅ Security: IronPort Email Security, Barracuda Email Security with ATP. I prefer to work on collaborative projects where I can be a partner in your business goals.

If your business depends on secure systems, compliant infrastructure, and zero downtime - I help you achieve exactly that. I am a Cybersecurity and IT Infrastructure professional with 10+ years of experience across banking and telecom environments, where security failures are not an option. I specialize in building, hardening, and monitoring enterprise environments aligned with ISO 27001 and PCI DSS 4.0. What I deliver ✔ End-to-end security architecture and implementation ✔ Vulnerability Assessment (VA) & Penetration Testing (PT) with actionable remediation ✔ SIEM deployment, correlation rule engineering, and threat detection use cases ✔ Endpoint security (EDR, antivirus, sandboxing) implementation and tuning ✔ Privileged Access Management (PAM) and least-privilege enforcement ✔ File Integrity Monitoring (FIM) and system hardening ✔ Zero-day threat analysis and proactive risk mitigation Network Security Expertise ✔ Palo Alto firewall configuration, policy design, and segmentation ✔ Secure network architecture and threat prevention ✔ Traffic control, access policies, and attack surface reduction Infrastructure & Operations ✔ VMware vSphere, Windows, and Linux administration ✔ High availability, patch management, and system optimization ✔ Data center operations (power, cooling, capacity planning) ✔ IT service management, vendor coordination, and SLA enforcement Why clients work with me I don’t just find vulnerabilities -I help you fix them properly I build security that aligns with real business operations I bring enterprise-level discipline from banking and telecom sectors I focus on practical, implementable security, not theoretical reports Typical Projects I Handle Full security assessment + remediation roadmap SIEM setup with real detection logic (not just logs collection) Firewall audit and optimization (especially Palo Alto) Infrastructure hardening and compliance alignment Incident investigation and threat analysis If you need someone who understands both security and infrastructure deeply, and can actually implement-not just advise - let’s discuss your project.

I'm Mahadi Hasan , a network engineer with 3 years of experience specializing in data center designs & deployments. Transitioning from traditional job to freelance work, I'm eager to leverage my expertise to help your businesses. I've successfully deployed network infrastructure for local renowned clients like Bashundhara Oil & Gas Company Ltd. (BOGCL), Coca-Cola Bangladesh Beverages, East West Media Group Ltd. (EWMGL), Radisson Blu Water Garden Hotel and so on.

I have over 12+ Years of working experience in the Networking Field. I am an enthusiastic NETWORK ENGINEER with the necessary drive and determination needed to resolve complex networking issues. Possessing effective organizational skills and excellent working knowledge of networking technologies and having a commitment to keep up to date with the latest developments. I’m an adaptable and efficient team player with excellent communication skills at all levels. Experienced in providing motivation, guidance, and an up-to-date networking consultancy service to clients. Now looking for a new and challenging network engineering task that will make the best use of my existing skills and experience and also further my career as a freelancer. Technical Skill Set Summary:::::::: • Cisco routers / switches / WLC • Cisco ASA / FTD / ISE / FMC • Cisco NX-OS • Network Automation using Python3 • Checkpoint Firewall & Endpoint Security • Sophos XG Firewall & Intercept X with advance EDR • Gateway Redundancy Protocols: HSRP / VRRP / GLBP • Routing: RIPng / OSPF / EIGRP / BGP / PBR / PfR / VRF • VLANs / STP / RSTP / Ether channel (LAG) • VPNs – GRE / IPSec / DMVPN • LAN-WAN / NAT / ACL • IPv4 / IPv6 • F5 Load Balancer • SIEM-Splunk, Qradar, Wazhu, Suricata, Elastic • Juniper Junos • Palo Alto Next-Generation Firewall • Fortinet Solutions- FortiGate Firewall, FortiMail email gateway, and FortiAnalyzer. • Juniper firewalls SRX Series • TCP/IP, DNS, DHCP • Wireshark • MikroTik • Virtualization: VMware vSphere 6.x • Windows Server 2012 R2 Qualifications: • Cisco Certified Specialist - Security Core (CCNP SCOR-350-701) • Cisco Certified Network Associate (CCNA-R&S) • Palo Alto Networks Certified Network Security Engineer (PCNSE) • APPLICATION DELIVERY FUNDAMENTALS (F5-101) • Fortinet Network Security Expert (NSE 1, NSE 2, NSE 3 & NSE 4) • JNCIA-SEC (JNCIA-SEC) • Junos (JNCIA-Junos)