Abdulrahman Asiri

Network Security Engineer

Aden, YE.

About

Highly accomplished Network Security Engineer with over 2 years of experience in designing, implementing, and fortifying critical financial infrastructure. Expert in advanced firewall orchestration (Sophos & FortiGate), VLAN segmentation, and secure access technologies, including VPNs and WAFs. Proven ability to lead complex projects, such as securing 90+ users across 10 branches and achieving 99.9% network uptime, ensuring robust defenses, high-availability communications, and stringent financial security compliance.

Work

Tamkeen Microfinance Bank

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Project Lead, Headquarters-Branches Network Connectivity

Aden, Aden, Yemen

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Summary

Led the engineering and implementation of secure, high-availability network connectivity solutions for 10 branch locations, enhancing inter-branch data transfer and communication stability.

Highlights

Engineered secure connectivity for 10 locations utilizing Sophos RED tunnels and high-availability Sophos/FortiGate firewalls for encrypted inter-branch data transfer.

Integrated secure VoIP infrastructure and applied advanced routing and security policies, sustaining 99.9% network stability across all connected sites.

Tamkeen Microfinance Bank

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Project Lead, Network Protection & Hardening

Aden, Aden, Yemen

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Summary

Directed initiatives to optimize Next-Gen Firewall configurations and enhance security monitoring, significantly strengthening perimeter defense and reducing attack surface.

Highlights

Optimized Next-Gen Firewall configurations to strengthen perimeter defense and implemented RBAC, enforcing least privilege per port and user.

Enhanced SIEM logging and monitoring capabilities, improving incident visibility and reducing response time to tighten micro-segmentation and reduce attack surface.

Tamkeen Microfinance Bank

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Project Lead, Tamkeen Wallet Security Launch

Aden, Aden, Yemen

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Summary

Orchestrated the security framework for a new digital wallet platform, managing Web Application Firewall rules and coordinating extensive penetration testing to ensure compliance and robust protection.

Highlights

Orchestrated WAF rules and managed web application security for the successful launch of the digital wallet platform.

Coordinated penetration testing with external security firms, ensuring continuous threat monitoring and full compliance during the launch phase.

Tamkeen Microfinance Bank

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Project Lead, SWIFT Environment Infrastructure

Aden, Aden, Yemen

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Summary

Architected and configured a secure SWIFT integration environment, meticulously managing firewall rules and user roles to ensure compliant and secure cross-border communication.

Highlights

Architected and configured secure servers and workflows for SWIFT integration, managing granular firewall rules and user roles for secure cross-border communication.

Implemented hardening measures to meet stringent SWIFT Customer Security Programme (CSP) standards, enhancing financial transaction security.

Tamkeen Microfinance Bank

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Project Lead, ATM & POS Secure Connectivity

Aden, Aden, Yemen

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Summary

Established secure IPsec VPN tunnels and dedicated VLANs to safeguard ATM and POS networks, ensuring end-to-end encryption and secure communication with core banking systems.

Highlights

Established IPsec VPN tunnels and dedicated VLANs to safeguard ATM and POS networks with end-to-end encryption and traffic segmentation.

Ensured secure handshakes between terminal endpoints and the core banking system, maintaining data integrity and compliance.

Tamkeen Microfinance Bank

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Network and Information Security Engineer

Aden, Aden, Yemen

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Summary

Directed network security operations and infrastructure defense for a financial institution, safeguarding over 90 users across 10 branches and ensuring 99.9% uptime for critical banking systems.

Highlights

Architected, configured, and maintained enterprise-level Sophos & FortiGate firewall clusters, effectively safeguarding 90+ users across 10 branches.

Implemented advanced VLAN segmentation and Layer 2 security measures, enforcing strict isolation and protecting internal banking data.

Developed and enforced granular Role-Based Access Control (RBAC) policies, applying the principle of least privilege across all administration tiers.

Deployed and managed secure RED tunnels and Site-to-Site VPNs, ensuring high-availability encrypted interconnection for 10 branches.

Coordinated penetration and stress testing with external cybersecurity firms to meet stringent financial security standards and identify vulnerabilities.

Monitored and maintained network health, sustaining 99.9% uptime for critical banking operations and branch-to-headquarters connectivity.

Education

University of Aden

Aden, Aden, Yemen
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Bachelor's Degree Information Technology

Languages

Arabic

Native

English

Proficient

Certificates

Certified in Cybersecurity (ISC2)

(ISC2)

Fortinet Certified Fundamentals in Cybersecurity

Fortinet Training Institute

Fortinet Certified Associate in Cybersecurity

Fortinet Training Institute

Sophos & FortiGate Firewall Management

SmartNet Technology

Skills

Firewalls & Security

Sophos Firewall, FortiGate (NGFW), WAF, IDS/IPS, Advanced Threat Protection, Next-Gen Security Management.

Connectivity & VPN

Sophos RED Tunnels, IPsec VPN (Site-to-Site), Remote Access VPN, SD-WAN, VLAN Segmentation, Inter-branch Connectivity.

Financial & Banking Systems

SWIFT Integration, ATM/POS Security, Financial Message Encryption, Secure Transaction Workflows, Core Banking Infrastructure.

Advanced Networking

VoIP Infrastructure & Routing, QoS, Static & Dynamic Routing, Layer 2/3 Switching, Grandstream Configuration, Network Optimization.

Security & Compliance

RBAC, Port Security & Hardening, Security Policy Development, Compliance Auditing, Vulnerability Assessment, Pen Test Coordination.

Monitoring & Operations

Incident Response, Network Monitoring & Logging, Server Hardening, IAM, System Performance Tuning, Technical Documentation.