Abdul Sattar
Network Architect @Marks and Spencer
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WORK HISTORY
Network Architect @Marks and Spencer
Senior Network Security / SD-WAN Engineer – Major Incident Recovery (M&S Programme)Vodafone UK (Contract)| Jun 2025 – Present Led the network security and SD-WAN stabilisation programme following high-impact service interruptions across enterprise and retail environments. Focused on restoring secure connectivity, improving Zero Trust enforcement, and preventing recurrence through strengthened routing, segmentation, and cloud access policies.Key Responsibilities & Achievements:• Realigned Zscaler ZIA/ZPA policies and identity-based access flows to restore secure user access across hybrid cloud applications• Reviewed, optimised, and cleaned Palo Alto and Fortinet NGFW rulebases, NAT policies, SSL decryption, URL filtering, and threat prevention profiles• Stabilised Cisco Viptela & Fortinet SD-WAN failover behaviour by correcting routing advertisements, path selection logic, DTLS/BFD health, and hub-spoke priorities• Performed deep-path flow analysis using NetBrain, firewall session tracing, packet captures, and end-to-end route validation to isolate and resolve root cause outages• Improved segmentation and Zero Trust enforcement through identity-aware access, app-based routing, and least-privilege policy controls• Developed and delivered HLD and LLD documentation, failover playbooks, and operational recovery runbooks for long-term resilience and support handover• Coordinated closely with Security, Cloud, Architecture, and Service Operations teams to deliver staged recovery with minimal user disruption• Result: Restored business-critical application access, eliminated repeat incident patterns, and significantly improved network stability and security postureCore Technologies:Zscaler ZIA / ZPA | Cisco Viptela SD-WAN | Fortinet Secure SD-WAN | Palo Alto (Panorama)| FortiManager / FortiAnalyzer | Azure VNet & Routing | BGP | OSPF | VRRP | IPsec | NetBrain | ThousandEyes
EDUCATION
Stratford Collage London
Graduate Diploma , Business Administration, Management and Operations
Stratford Collage London
Postgraduate Degree, Business and Technology
Edge Hill University
Master of Business IT - MBA, Business and IT Management
Stratford College London
PGD, Business Administration and Management, General
Edge Hill University
PGD, Business IT Management
Edge Hill University
Master of Business IT - PGD, Business Administration and IT Management, General
ABOUT ABDUL SATTAR
As a Network Architect at Marks and Spencer, I specialize in network security, SD-WAN stabilization, and Zero Trust policy enforcement with over 10 years of experience in the field. My expertise includes Zscaler ZIA/ZPA configuration, Palo Alto and Fortinet NGFW optimization, and secure access policy realignment across hybrid cloud applications. With a strong focus on cloud security, vendor management, and service delivery, I am committed to building resilient and secure network infrastructures that drive business performance. My mission is to enhance connectivity, prevent disruptions, and implement robust security frameworks that align with organizational goals.
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