Mohiuddin Siddique

Background

About Mohiuddin Siddique

IT Network & Security Administrator | Cybersecurity | Infrastructure | Automation I am an IT Network and Security Administrator with 7+ years of hands-on experience designing, implementing, and securing enterprise-grade IT infrastructure. My expertise spans Fortinet FortiGate, SonicWall, and Cisco platforms, where I’ve deployed and maintained LAN/WAN, VPN, and Firewall solutions tailored to business continuity and compliance needs. I specialize in network segmentation using VLANs, managing routing protocols like OSPF, BGP, and RIP, and applying RAID configurations for data resilience. I’ve actively led end-to-end firewall deployments, performed site-to-site VPN setups, and mitigated risks through system hardening, patching, and access control policies. My work with ZTNA (Zero Trust Network Access) has helped reduce lateral movement and improve threat visibility. I’m proficient in monitoring and SIEM tools like Nagios, NextGen SIEM, ServiceNow and Zscaler, enabling real-time infrastructure awareness and log correlation. I regularly collaborate with SOC teams to identify and respond to incidents aligned with ISO 27001 and HIPAA standards. With growing interest in automation, I’ve also scripted tasks in Python and Google Colab to streamline asset management, log analysis, and vulnerability assessments. Metrics Matter: Reduced firewall rule conflicts by 35% through systematic review and optimization across FortiGate and SonicWall appliances Decreased vulnerability exposure by 50% by coordinating weekly patch cycles and remediating high-risk CVEs using Nessus and Nmap Automated log parsing and alerting workflows using Python and Colab, improving response time to security incidents by 40% Improved SIEM correlation accuracy by 30% by fine-tuning log sources from FortiAnalyzer, NextGen SIEM, and Zscaler Ensured 99.9% infrastructure uptime in sensitive environments by applying hardened configurations and continuous security monitoring Led security audits for ISO 27001 readiness, eliminating 100% of non-compliance findings related to access control and network policy enforcement Let’s connect if you’re looking for a results-driven IT Infrastructure Specialist who blends deep technical knowledge, a security-first mindset, and operational precision. I’m actively open to permanent or contract opportunities in roles like IT Systems Administration, Network & Security Engineering, SOC coordination, Firewall Operations (FortiGate, SonicWall), or Cloud Infrastructure Management — both remote and on-site, including global assignments like the UAE & India.