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rajsegar/README.md

Rajsegar Alagarathnam

MSc Cyber Security Graduate | Junior Penetration Testing | Security Research

Sunderland, United Kingdom · LinkedIn · TryHackMe · Medium · Email

About

MSc Cyber Security graduate with Distinction and over four years of IT operations experience across systems administration, Microsoft 365, Active Directory, endpoint management, and network support.

I’m building my cybersecurity portfolio through authorised labs, security projects, and technical write-ups. I’m preparing for the CPENT certification and interested in junior penetration testing and cybersecurity roles in the UK.

Skills and Tools

  • Security: Web application testing, vulnerability assessment, network enumeration, Active Directory security, security reporting
  • Tools: Nmap, Burp Suite, Metasploit, Wireshark, Kali Linux
  • IT systems: Windows Server, Active Directory, Microsoft 365, Microsoft Intune, VMware
  • Research interests: AI and LLM security, federated learning, secure system design

Featured Projects

Project Description
SME VAPT Framework MSc project covering a penetration-testing and vulnerability-assessment workflow for small and medium-sized businesses.
CPENT Project Portfolio Study notes, lab methodology, and learning resources for CPENT preparation.
Vulnerable and Secure Web App Lab An educational project comparing vulnerable web application examples with security fixes.
PoisonScope AI security capstone project exploring adversarial testing of language models.

Security testing in my portfolio is limited to authorised labs, CTFs, and systems where I have permission.

Experience

Intern System Administrator — Vital Hub Innovations Lab
2022–2023

  • Supported Active Directory and Microsoft 365 administration, account access, and group policies.
  • Assisted with endpoint management, device compliance, and operational monitoring.

Training and Independent Learning

  • Studying AI security and federated-learning frameworks.
  • Developing practical skills in web application testing, vulnerability validation, and remediation reporting.
  • Preparing for the CPENT certification.

Education

MSc Cyber Security, Distinction — University of Sunderland

Contact

I’m currently seeking junior cybersecurity opportunities in the UK. You can contact me via LinkedIn or email.

Popular repositories Loading

  1. security-study-plan security-study-plan Public

    Forked from jassics/security-study-plan

    Complete Practical Study Plan to become a successful cybersecurity engineer based on roles like Pentest, AppSec, Cloud Security, DevSecOps and so on...

  2. Public-URL Public-URL Public

  3. Federated-Learning-Frameworks- Federated-Learning-Frameworks- Public

    FL Frameworks installation in AWS Environment

    Jupyter Notebook

  4. Spam_Mail_Detection Spam_Mail_Detection Public

    Spam_mail_dect

    Jupyter Notebook

  5. PoisonScope PoisonScope Public

    This tutorial provides a broad end-to-end overview of training, evaluating, and attacking a model using TextAttack.

    Jupyter Notebook

  6. -Capstone-Project-PoisonScope-Detecting-and-Analyzing-Backdoored-LLMs-on-Hugging-Face -Capstone-Project-PoisonScope-Detecting-and-Analyzing-Backdoored-LLMs-on-Hugging-Face Public

    Large language models (LLMs) are rapidly evolving, revolutionizing natural language processing (NLP) applications.

    Python 1