Project Documentation
Download reports detailing end-to-end security projects in design, deployment, testing, and threat analysis.
Circle10 Study App: Web App Architecture, Design & Development
A detailed breakdown of the architecture and development process for a decoupled, mobile-first web application engineered for cybersecurity students.
Download Lab ReportCisco Packet Tracer: Networking Simulation
A comprehensive simulation report demonstrating the design and implementation of a secure, segmented small enterprise network using inter-VLAN routing and strict ACLs.
Download Lab ReportContinuous Compliance & Change Management in AWS
Documentation covering the implementation of an automated change management and continuous compliance alerting system in AWS using Config and SNS.
Download Lab ReportWazuh Manager: Virtual Lab Setup & Endpoint Policy Configuration
A robust guide on deploying a foundational threat detection system, covering SIEM/XDR setup, agent deployment, and file integrity monitoring.
Download Lab ReportSophos Next-Gen Firewall: Installation, Setup & Security Policy Configuration
A comprehensive guide documenting the deployment of Sophos SFOS, network interface engineering, NAT configuration, and the enforcement of advanced web protection policies.
Download Lab ReportVirtual Lab: Setup & Configuration
A detailed report outlining the architectural setup and provisioning of a multi-node virtual infrastructure for safe security testing and network simulation.
Download Lab ReportVirtual Lab: Vulnerability Assessment
A comprehensive analysis detailing the enumeration and exploitation of a simulated corporate Active Directory environment using offensive security methodologies.
Download Lab ReportCloud Security: Building a Security Monitoring System in AWS
A detailed report demonstrating the architecture and implementation of an automated security monitoring and active defense system within Amazon Web Services.
Download Lab ReportBuilding a Cloud-Hosted VPN with WireGuard and AWS
A comprehensive guide demonstrating the end-to-end deployment of a fast, highly secure, and self-managed Virtual Private Network (VPN) utilizing the WireGuard protocol hosted on AWS.
Download Lab ReportBuilding A Unified Security Appliance
A comprehensive record detailing the considerations and procedures applied in the production of a multipronged enterprise-grade network security device.
Download Lab ReportDesigned for Protection
Cybersecurity Analyst | From Building Codes to Threat Detection
I have always been a "high-resolution thinker"—someone who operates at the intersection of creative design and rigorous technical problem-solving. Long before my decade-long career as an architect, my affinity for details manifested in a lifelong habit of tinkering with computers. From establishing a personal data backup culture that has preserved my files for 18 years, to manually hunting down file-exfiltrating malware to protect my university peers, my innate security mindset has always been active.
In Architecture, I learned that design is the strategic orchestration of limited resources to build resilient structures. Today, I bring that combined technical intuition and architectural mindset to cybersecurity. Just as I once navigated structural tolerances and project administration, I now leverage frameworks like NIST and ISO 27001 to architect secure digital environments while focusing on detection, triaging, and investigating security alerts.
Defending an organization isn't just about deploying tools. It’s about understanding the deep, structural details where vulnerabilities hide, and orchestrating people, policy, and technology to build unshakeable defenses.
Contact Me
Get in touch to discuss projects, security solutions and opportunities.
Mr. Jeffrey Obi
Cybersecurity Analyst
Location
Lagos, NigeriaWebsite / GitHub
https://github.com/JeffreyyyyONotice: Further contact information, including direct phone numbers and alternative communication channels, will be provided at my discretion via email after initial contact has been established.
Technical Projects
Comprehensive summaries of built projects completed lab simulations.
Technical Skills & Tools Inventory
A comprehensive overview of my technical capabilities and the software stacks I utilize.
Security Ops & Threat Intel
- SIEM & XDR: Wazuh, Sophos Central
- Detection & Integrity: IDS/IPS, File Integrity Monitoring (FIM)
- Traffic Analysis: Wireshark, tcpdump
- Malware & OSINT: VirusTotal, CyberChef, Open Source Intelligence
- Investigations: Phishing Analysis (Thunderbird)
Cloud Security & Automation
- AWS Infrastructure: EC2, S3 Security, IAM
- Cloud Monitoring: CloudTrail, CloudWatch, AWS Config
- Serverless Security: EventBridge, Lambda, Amazon SNS
- Methodology: Zero-Trust Architecture Principles
- Scripting: Python scripting and automation
Network & Systems Infra
- Perimeter Security: Sophos Firewall, WAF, VPN, DMZ
- Routing & Access: VLANs, ACLs, Cisco Packet Tracer
- Operating Systems: Linux (Kali, Parrot, Ubuntu), Windows Server 2022
- Virtualization: VMware Workstation, VirtualBox
- Cryptography: Public Key Infrastructure (PKI), OpenSSL
Professional Certifications
Verified credentials and formal security competencies.
CompTIA Security+
Validates foundational knowledge of cybersecurity principles, threat management, and secure network architecture.
Threat Management
Cryptography
Identity & Access
Incident Response
Verify Credential
ISC2 Certified in Cybersecurity
Demonstrates core competency in security concepts, access controls, network security, and incident response.
Security Principles
BC/DR
Access Controls
Network Security
Verify Credential
Google Cybersecurity Professional
Confirms hands-on ability to use Python, Linux, SQL, and SIEM tools to detect and mitigate security threats.
Packet Analysis
Python & SQL
SIEM (Splunk/Chronicle)
Linux CLI
Verify Credential
Fortinet Certified Fundamentals
Certifies foundational understanding of the cybersecurity landscape, network security concepts, and endpoint protection.
InfoSec Concepts
Network Security
Endpoint Security
Fortinet Security Fabric
Verify Credential
Résumé
My concise work history, education, and technical background.
Jeffrey Obi
Cybersecurity Analyst
Lagos, Nigeria
(+234) *** *** ****
jeffrey.o.obi@gmail.com
linkedin.com/in/jeffreyoo
jeffreyyyyo.github.io/Portfolio
Professional Summary
Detail-oriented Cybersecurity Analyst with hands-on experience securing simulated enterprise environments by deploying SIEM (Wazuh), implementing AWS cloud security services, configuring network hardware (Cisco 2960-24TT, MikroTik Routerboard), and implementing both enterprise and open-source security tools (Sophos, pfSense), aligning security operations with NDPA, NIST CSF and MITRE ATT&CK frameworks. Transitioning from a background in design and compliance, to focus on threat detection, network security, and incident analysis while backed by robust homelab experience and industry-standard certifications (CompTIA Security+, ISC2 CC).
Core Competencies & Tools
- Security Operations: SIEM (Wazuh), EDR/XDR (Sophos Central), IDS/IPS (Suricata), File Integrity Monitoring (FIM).
- Network Security: Network Architecture (Packet Tracer, Cisco IOS, Mikrotik RouterOS), Packet Analysis (Wireshark, tcpdump), Firewalls (Sophos, pfSense), VPN (WireGuard, Tailscale), VLANs, ACLs, Zero-Trust Architecture.
- Cloud & OS: AWS (EC2, CloudTrail, CloudWatch, Config, IAM), Linux (Kali, Ubuntu), Windows (Server 2022), Virtualization (VMware, VirtualBox).
- Frameworks & Threat Intelligence: MITRE ATT&CK, NIST CSF, NDPA, Cybercrime Act, OSINT, Phishing Analysis, Malware Analysis (VirusTotal, CyberChef).
Cybersecurity Projects (Homelab Experience)
- AWS Cloud Monitoring and Alerting: Built a continuous compliance pipeline using AWS Config and CloudTrail, detecting unauthorized access and triggering real-time alerts for simulated misconfigurations in under 30 seconds.
- Wazuh SIEM Integration: Deployed Wazuh SIEM servers across AWS EC2 and local VMware instances, configuring endpoint agents on 5+ devices to ensure 100% policy compliance and centralized log management. Configured custom detection rules mapped to the MITRE ATT&CK framework to monitor for brute force attempts and file integrity (FIM).
- Firewall Deployment: Deployed Sophos and pfSense virtual firewalls, configuring strict inbound/outbound traffic policies and web filtering to block 100% of simulated malicious traffic.
- Packet & Traffic Analysis: Analyzed 10,000+ packets using Wireshark and tcpdump to analyze HTTP/HTTPS connections, successfully isolating simulated DDoS attack signatures.
- Phishing & Malware Analysis: Investigated 20+ malicious emails in a sandbox using CyberChef, VirusTotal, and custom Python automation to extract indicators of compromise (IOCs), and then documented the findings for incident response.
- Secure Network Architecture: Designed enterprise network topologies using Cisco Packet Tracer, configuring secure remote access and applying ACLs to enforce strict communication permissions across 5+ VLANs.
Relevant Technical Experience
Cybersecurity Analyst
June 2025 - PresentIndependent Contracting, Nigeria
- AltSchool Africa: Built and managed a web-based cybersecurity study tool using HTML and GitHub Pages, supporting 100+ active student users with 100% uptime and zero security breaches.
- Interland Transport Ltd: Configured an ISP router (ZTE ZXHN) to create a separate throttled network segment for guests and a dedicated segment for office staff, improving network efficiency for official tasks and eliminating bandwidth theft.
- Cathedral Church of the Pentecost: Transformed a low-range flat network into a full-range segmented network, increasing building coverage by 300% and ensuring high availability by implementing a backup power supply.
- Private Residential Client: Configured and installed consumer-grade routers (Mikrotik & TP-Link) as wireless bridges in order to increase total coverage by 100%.
Additional Professional Experience
Technical Infrastructure & Compliance Consultant
October 2022 - June 2025Dakboss Ltd, Lekki Phase I, Lagos
- Translated client requirements into technical blueprints for 10+ projects, ensuring 100% compliance with regulatory standards and physical security requirements.
- Conducted rigorous vendor capability assessments, reducing infrastructure implementation bottlenecks by 15%.
Systems Compliance Specialist
June 2019 - September 2022Greenville Liquefied Natural Gas Co. Ltd, Victoria Island, Lagos
- Supported 45 large-scale infrastructure projects with a strict focus on systems design, security protocols, and compliance (ISO, NFPA).
- Ensured strict adherence to regulatory standards, deploying physical and operational risk mitigation practices that reduced year-to-year site incident reports by 20%.
Compliance Officer
February 2019 - June 2019Joe Faraday Limited, Banana Island, Lagos
- Audited 6 production sites to verify execution of operational policies, cutting compliance reviews by 75%.
Certifications
- CompTIA: Security+
- ISC2: Certified in Cybersecurity
- Google: Cybersecurity Professional Certificate
- Fortinet: NSE 2 Certified in Cybersecurity
Education
- AltSchool Africa: Diploma in Cybersecurity
- Covenant University: Master of Science in Architecture
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