Open to cybersecurity trainer & security roles
Abrar Lyngdoh
I break down problems so students can solve them,and systems so teams can secure them.
CEH v12 certified ethical hacker with a B.Tech in CSE, currently teaching at Hundredfold Academy in Shillong. I want to bring the two together and train the next wave of defenders.
01 · About
One habit, two classrooms.
I grew up in Shillong, Meghalaya, and went to Gurugram to study Computer Science. There I got hooked on security: taking systems apart to see where they break, then helping make them stronger. That led to TryHackMe's Jr Penetration Tester path and, in 2023, the CEH v12 certification.
Today I teach Quantitative Aptitude at Hundredfold Academy. Showing a student how to crack a percentage problem in twenty seconds takes the same skills as a pentest: break the problem down, spot the pattern, check every step.
Next, I want to put both together as a cybersecurity trainer, teaching people to think like attackers so they can defend like professionals.
B.Tech, Computer Science & Engineering
St. Andrews Institute of Technology & Management, Gurugram
2018 – 2022
Higher Secondary, Science
St. Edmund's Higher Secondary School, Shillong
2015 – 2017
2017
Finished Higher Secondary (Science) at St. Edmund's, Shillong
2022
Graduated B.Tech CSE · TryHackMe Jr Penetration Tester
2023
Certified Ethical Hacker (CEH v12), EC-Council
2026
Started teaching Quantitative Aptitude at Hundredfold Academy
Next
Bringing both together as a cybersecurity trainer
02 · Security
Thinking like an attacker, working for the defender.
Hands-on with Windows and Linux environments, systems and network security. I find vulnerabilities, put security best practices in place, and keep IT running smoothly, always with permission and always security-first.
Certified Ethical Hacker (CEH v12)
EC-Council · 2023
Jr Penetration Tester
TryHackMe · 2022
Vulnerability Assessment & Pentesting
Finding weaknesses before attackers do, and reporting them clearly.
Web Application Testing
OWASP Top 10, race conditions, HTTP parameter pollution and more.
Linux & Windows Administration
System configuration, access controls and hardening on both platforms.
Log Analysis
Reading the trail a system leaves behind, with a security-first mindset.
Toolkit
- Burp Suite
- Nmap
- Metasploit
Languages
- Python
- C
- SQL
- Bash
- JavaScript
03 · Training
I already teach. Security is what I want to teach next.
At Hundredfold Academy I teach Quantitative Aptitude to government-job aspirants. Every class is practice in what a good trainer does: read the room, break complex ideas into steps, and check that the learning actually landed.
Quantitative Aptitude Faculty
Hundredfold Academy · Shillong, Meghalaya
Since June 2026 · Government-job aspirants
- Percentages
- Ratio & Proportion
- Time & Work
- Time, Speed & Distance
- Interest
- Data Interpretation
Security sessions I can deliver
- Cyber hygiene & phishing awarenessEveryone
- Linux fundamentals for securityBeginner
- Web app security & the OWASP Top 10Intermediate
- Recon & scanning with NmapIntermediate
- Intercepting traffic with Burp SuiteIntermediate
- Intro to exploitation with MetasploitIntermediate
Try a 60-second lesson
1/7 · 0 pts
Which Nmap flag identifies the service and version running on open ports?
Concept first
Every shortcut is derived in class, so learners know why it works and when it breaks.
Practice under pressure
Timed drills that mirror the real exam, so accuracy holds when the clock is running.
Debug the mistake
Wrong answers get traced step by step, the same way I trace a bug in a system.
04 · Notes
Shortcuts & write-ups.
05 · Contact
Let's talk.
Hiring a cybersecurity trainer, building a security team, or planning a cyber-awareness session for your staff or students? I'd love to hear from you.
Shillong, Meghalaya, India