Md. Wahid Sadiq Ratul
Md. Wahid Sadiq Ratul

Red Team & Offensive Security Engineer

Actively looking · Member since 24 Oct 2026
Location
Dhaka, Bangladesh
Desired salary
Unspecified
Work preference
Hybrid
Experience level
Mid

About

Professional summary

I am a Red Team and Offensive Security Engineer with nearly three years of hands-on experience in adversary emulation, vulnerability assessment and penetration testing, and SOC/SIEM engineering. I hold the Hack The Box Certified Penetration Testing Specialist (CPTS) certification and have worked across enterprise, government, and critical-infrastructure environments.

I have led full-scope security assessments covering web applications, APIs, internal networks, perimeter infrastructure, Active Directory, and wireless environments. My work includes identifying critical vulnerabilities, validating remediation, and translating technical findings into prioritized, business-aligned recommendations.

I specialize in realistic threat emulation, including credential abuse, privilege escalation, lateral movement, post-exploitation, and attack-path analysis mapped to MITRE ATT&CK. I also conduct manual web and API penetration testing and assess specialized communication and monitoring platforms.

On the defensive side, I build and tune SIEM capabilities using ELK, Splunk, and Wazuh. I have developed detection dashboards, SOC procedures, and incident-response playbooks to improve real-time visibility and response workflows.

My infrastructure experience includes Linux and Windows Server administration, Active Directory and GPO, Proxmox VE, Docker, Nginx, Zabbix, WireGuard, NGFW hardening, and AWS/Azure fundamentals. I use Python, Bash, and PowerShell to automate reconnaissance, parsing, and reporting tasks.

I am open to international relocation and visa sponsorship opportunities, including roles in the USA, Canada, and Europe. I am interested in on-site, hybrid, and remote cybersecurity roles focused on red teaming, offensive security, VAPT, and security engineering.

Skills

29 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Data Stores

Languages & Frameworks

Experience

Career history

Associate Cyber Security Analyst — Red Team & VAPT Technometrics Limited

I lead full-scope red team and VAPT engagements across web applications, APIs, internal networks, and perimeter infrastructure. I emulate real-world threat actors, conduct Active Directory attack-path discovery, credential abuse, privilege escalation, lateral movement, and post-exploitation activities mapped to MITRE ATT&CK.

I have identified and reported more than 50 critical and 70 high-severity vulnerabilities in enterprise and national-scale assessments. I provide prioritized remediation guidance and perform retest validation before sign-off, including remediation of cryptographic weaknesses such as legacy TLS configurations and SWEET32 ciphers.

I support public-sector and critical-infrastructure engagements, including border-security, counter-terrorism, telecommunications monitoring, and regulatory systems. I also engineered an on-premise ELK SIEM with custom dashboards and tuned detections, authored SOC SOPs and incident-response playbooks, hardened routing and NGFW environments, deployed WireGuard and Zabbix, and built Python/Bash automation for reconnaissance, parsing, and reporting.

Junior Cyber Security Engineer TechForing Limited

I performed host and endpoint digital forensics on compromised PCs, laptops, and mobile devices to isolate malware and reconstruct attack timelines. I also created OSINT profiles and evidence dossiers to support victims and law-enforcement actions.

I executed advanced internal penetration testing, including Active Directory attack chains, network reconnaissance, credential-cache capture, and NT-hash retrieval using tools such as Certipy, Impacket, Hashcat, and Kerbrute. I also conducted cryptocurrency wallet and blockchain analysis to trace malicious actors and illicit digital assets.

Education

Learning history

University of Dhaka

Professional Master's in Information & Cyber Security (PMICS), Information and Cyber Security

CGPA: 3.35. Focused on security architecture, threat modeling, offensive security, and defensive security.

BRAC University

Bachelor of Science, Computer Science & Engineering

Focused on software engineering, data structures and algorithms, computer networks, operating systems, databases, and cybersecurity foundations.

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