Mohammad Ahmadi Sadr

Network Security Engineer

Ottawa, Ontario | +1 438-454-0470 | mohamadahmadisadr@gmail.com

Network Security Engineer experienced in network monitoring, troubleshooting, VPN and firewall configuration. Skilled in vulnerability scanning, security alert analysis, incident response, and remediation. Combines software-development knowledge with systems thinking to improve automation and network reliability. Strong communicator who documents technical findings and explains solutions clearly across teams. Adaptable, detail-oriented, and committed to building secure and resilient infrastructure.

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Work Experience

Network Engineer

Feb 2024 – Present

TitenTech Security LLC | US - Remote

• Design, configure, and maintain secure LAN/WAN, VPN, firewall, switching, and wireless environments.
• Monitor network performance and troubleshoot routing, DNS/DHCP, connectivity, and availability issues.
• Implement network security controls, including segmentation, ACLs, MFA, IDS/IPS, and secure remote access.
• Review security logs, support vulnerability assessments, and assist with incident response and remediation.
• Document network infrastructure and automate routine administration to improve reliability and response times.

Network Security Engineer

Jul 2022 – Nov 2023

Saman Gostar Ghalam | Tehran, Iran

• Monitored network infrastructure, investigated alerts, and troubleshot connectivity and performance issues.
• Configured and maintained VPN connections and firewall security policies.
• Supported network security operations, access control, and protection of systems and data.
• Assisted with cybersecurity incident response by analyzing alerts, identifying affected systems, and supporting remediation.
• Performed vulnerability scans and documented security findings for corrective action.
• Maintained network and security documentation, including configurations, incidents, and remediation activities.

Junior Network Security Engineer

Mar 2022 – Jul 2022

Vestasystem | Shiraz, Iran

• Monitored network connectivity, infrastructure health, and security alerts.
• Assisted with VPN setup, firewall configuration, and access-control updates.
• Troubleshot network outages, connectivity issues, and performance problems.
• Supported cybersecurity incident investigations and remediation activities.
• Performed vulnerability scans and documented findings for corrective action.
• Updated network diagrams, security records, and troubleshooting documentation.

Software Developer – Networked Applications

Oct 2020 – Mar 2022

Amoozban | Shiraz, Iran

• Developed and maintained software applications based on business and user requirements.
• Built client-server features using APIs, data exchange, and network communication.
• Debugged application, connectivity, and integration issues to improve system reliability.
• Collaborated with team members to design, test, and deploy new software features.
• Used version control, code reviews, and technical documentation to support maintainable development.
• Performed software testing and troubleshooting to identify defects and improve application performance.

Tech Stack & Skills

Languages

SQL Python PowerShell Scripting C Java Kotlin Go

Network Engineering

TCP/IP LAN/WAN Routing & Switching DNS DHCP VPNs Firewall Configuration Network Monitoring Troubleshooting

Cybersecurity

FortiOS FortiGate FortiAnalyzer FortiGuard Labs FortiManager FortiClient Wireshark Network Security Firewall Administration NAT IDS/IPS Web Filtering VPNs (IPsec, SSL) MITRE ATT&CK Framework Playbooks & Runbooks Access Controls Network Monitoring & Logging (SIEM) VLANs Security Alert Analysis Incident Response Vulnerability Scanning Remediation Security Documentation

Applications & Tools

Microsoft Excel Active Directory FortiSandbox

AI Fundamentals

Prompt Engineering & Output Evaluation Creating Responsible Generative AI Solutions AI for Deep Packet Inspection URL Filtering AI-Driven Malware Prevention

Project Management Fundamentals

Agile Waterfall Scrum Kanban Trello

Skills

Information Security Malware Analysis Network Monitoring Threat Detection Threat Analysis Incident Response Vulnerability Management Security Policies & Compliance Cloud Compliance & Best Practices Time Management Problem Solving Teamwork and Creativity

Automation & DevOps

Scripting Git CI/CD Concepts Jenkins Gradle GitHub Actions

Software & Systems

Client-Server Applications REST APIs Network Communication Application Troubleshooting

Education

Bachelor’s Degree in Computer Software Engineering

Azad University – Shiraz, Iran

Jul 2022

• Developed strong proficiency in SQL through extensive coursework and practical projects.
• Built a solid foundation in mobile application development with hands-on projects.
• Specialized in Software Engineering and Computer Science fundamentals.

Projects

Atlas VPN — Native iOS VPN Client

SwiftUI | Network Extension | Xray | sing-box | Go/gomobile | iOS 16

Jul 2025 - Present

• Built a native SwiftUI VPN client based on a shared Android/iOS proxy architecture.
• Integrated Xray and sing-box proxy cores behind a unified Swift ProxyCore interface using Go/gomobile.
• Implemented packet-tunnel functionality with NEPacketTunnelProvider and NETunnelProviderManager.
• Added support for VMess, VLESS, Trojan, and Shadowsocks configuration imports.
• Implemented VPN profile persistence, latency testing, subscription parsing, and traffic/expiry metadata handling.

SwiftUI Network Extension Xray sing-box Go/gomobile iOS 16

Certifications

Fortinet Certified Professional (FCP) SASE

Expected July 2026

NPower Canada | Ottawa, Ontario

SASE, Fortinet, Network Security

Fortinet FortiOS 7.6 Administrator (NSE4)

June 2026

NPower Canada | Ottawa, Ontario

FortiOS 7.6, FortiGate Administration, Network Security

Agile Foundations

Dec 2024

Microsoft and LinkedIn

Agile Project Management, Agile Methodologies

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Git for Teams

Dec 2024

Microsoft and LinkedIn

Git, Version Control, Collaboration

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