Ishan Nim.Offensive Security Engineer From Another Planet.

Head of Penetration Testing & Cybersecurity at Cyber Crew, Tokyo. Creator of AlienGate. Red teaming, payload engineering and the fascinating depths of the dark web.

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Portrait of Ishan Nim, offensive security engineer, Tokyo

Head of Penetration Testing & CybersecurityTokyo, JapanSince 2008


Summary

Learning by doing, and sharing what I learn.

Hi, I’m Ishan Nim — a cybersecurity enthusiast with a sharp focus on offensive security, ethical hacking, and red teaming. I currently lead the Security Research and Analysis Team at Cyber Crew Inc. in Tokyo, where I dive deep into threat landscapes, vulnerability analysis, and exploit development.

I’m passionate about the darker corners of the internet — from deep/dark web monitoring to payload crafting and adversary simulation. Whether it’s developing custom payloads, exploring underground forums, or simulating real-world attacks in red team engagements, I thrive in environments that challenge the limits of security.

I believe in learning by doing and sharing what I learn. I’m active in the infosec community and always looking to connect with others who are just as curious and relentless about cybersecurity.

Experience

Since 2008, on the offensive side.

Lead Security Engineer
Apr 2025 – Present株式会社CyberCrew · Akihabara, Tokyo
Senior Security Consultant
Apr 2025 – Sep 2025株式会社エスプール · Tokyo
Security Analyst
Jan 2025 – Sep 2025株式会社エスプール · Akihabara
Head of Cyber Security
Dec 2023 – Dec 2024Binary Yard · Tokyo
Senior Security Analyst
Mar 2023 – Dec 2024Binary Yard · Tokyo
Head of Penetration Test
Apr 2022 – Dec 2024sea three reve co., ltd. (c3reve. inc) · Tokyo
Penetration Tester
Apr 2022 – Dec 2024sea three reve co., ltd. (c3reve. inc) · Tokyo
Senior Software Engineer
Apr 2022 – Dec 2024株式会社ワールドウィング · Chiba
Junior Software Engineer
May 2021 – Dec 2022株式会社ワールドウィング · Chiba
Founder
Apr 2008 – Dec 2024Elves Core | サイバーセキュリティ · Fukuoka

Certifications

GXPNGIAC Exploit Researcher and Advanced Penetration Tester
CCSCisco Cybersecurity Specialist
MAPTMobile Application Penetration Tester
CSFPCCyber Security Professional Certificate
CEHPCEthical Hacking Professional

Top skills

Assessment MethodologiesWeb Application Penetration TestingHost & Networking Penetration Testing

Education

ICBT Campus
Bachelor's degree, Information Technology · 2014–2017
Fukuoka International Academy
Japanese language, Japanese Studies · 2017–2019
西日本アカデミー
DX program · 2019
From the blog

Field notes

All posts →

Let’s connect — especially if you’re into red teaming, payload engineering, or the fascinating depths of the dark web.

[email protected]linkedin.com/in/ishannim