Muhammad Najaf Nisar
Network Security Engineer @ITC Secure
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WORK HISTORY
Network Security Engineer @ITC Secure
London, GB
Triaged and resolved incidents from network monitoring tools (SolarWinds), validating impact and driving fixes within SLA.Investigated performance/connectivity issues (latency, packet loss, interface errors) and completed root-cause analysis with clear incident notes.Configured and supported Cisco Catalyst/Nexus switching (VLANs, trunks, STP (Spanning Tree Protocol), EtherChannel (Link Aggregation), port-security).Created/modified configurations on Cisco routers/switches (ACLs (Access Control Lists), routing changes, secure management, device hardening).Managed multi-vendor firewalls (Cisco ASA (Adaptive Security Appliance)/FTD (Firepower Threat Defense), Palo Alto, Fortinet) including policy updates, NAT (Network Address Translation), and object management.Troubleshot firewall traffic flows using logs, session tools, and packet captures to identify policy/NAT/routing issues.Investigated security alerts from SIEM tools and refined/tuned alerts to reduce false positives.Reviewed network behavior analytics alerts, validated anomalies against baseline traffic, and escalated confirmed threats with evidence.Performed vulnerability scanning and reporting using QualysTracked remediation actions with customer teams and verified fixes through re-scans and reporting updates.Acted as first point of contact for customer requests, providing timely updates and maintaining strong stakeholder communication.QA’d Incident/Change tickets, ensuring accurate technical details, risk/rollback steps, and complete closure notes.Implemented approved Change tickets during maintenance windows with pre/post checks and documentation updates.Supported Cisco ISE (Identity Services Engine) NAC (Network Access Control) operations
EDUCATION
Government College University, Faisalabad
Bachelor- BSCS, Computer Science
Ulster University
Master's degree, International Business
ABOUT MUHAMMAD NAJAF NISAR
As a Network Security Engineer at ITC Secure, I specialize in safeguarding enterprise infrastructure through proactive threat monitoring, network defense, and incident response. My role involves managing and optimizing firewalls, VPNs, IDS/IPS systems, and Cisco security solutions, while ensuring robust compliance and seamless service delivery across client environments.At ITC Secure, I work collaboratively within the Network Operations Centre (NOC) to analyze network security alerts, perform vulnerability assessments, and implement network protection measures that align with industry best practices. My hands-on experience spans SIEM management, endpoint protection, network performance analysis, and resolving complex L2 security incidents to maintain uninterrupted and secure network operations.With a Bachelor’s in Computer Science and a Master’s in International Business with Data Analytics from Ulster University, London, I bring a unique blend of technical depth and strategic insight to every project. This combination enables me to approach cybersecurity challenges with both technical precision and a strong understanding of business impact.I’m passionate about evolving in the fields of cybersecurity, network defense, and cloud security, continually enhancing my skills to protect critical systems and drive secure digital transformation.
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