JA

About

JobyerAhmed

Offensive Security Researcher · Offensive security research, red-team engagements, and executive advisory — since 2010.

I'm Jobyer Ahmed — a cybersecurity professional and entrepreneur. For more than a decade I've worked on the attacker side of the table: red-teaming enterprises, breaking appliances and applications, and helping leaders translate technical findings into clear, defensible decisions.

My work sits at the intersection of deep technical research and executive advisory. On any given month I might be developing an exploit, leading a full-scope engagement, or sitting in a boardroom explaining why a risk matters.

I carry a mix of offensive depth and governance breadth — reflected in the certifications below — that shapes how I think security should be practiced: rigorous, evidence-based, and aligned with the business.

I founded Bytium LLC in 2024 to deliver this work at scale with a small, senior team, and previously ran Rednode Services Ltd, a security research lab that published CVEs and trained the next wave of offensive operators.

15+
Years in cybersecurity
60+
Engagements delivered
7
CVEs credited
9
Industry certifications

Experience

8 positions

  1. Jan 2024 — Present

    Founder & Security Lead

    Bytium LLC

    Cybersecurity consulting focused on offensive security, penetration testing, and security engineering.

  2. 2022 — 2024

    Security Consultant & Advisor

    BrosPly Ltd · Remote

    Cybersecurity consulting on architecture, vulnerability assessment, and compliance alignment.

  3. Feb 2022 — Jan 2024

    Founder & Cybersecurity Researcher

    Rednode Services Ltd

    Established a security lab for exploit development and vulnerability research; published CVEs.

  4. Oct 2022 — May 2023

    Penetration Tester (Contract)

    Red Team Partners · London, UK

    Enterprise penetration testing across web, infrastructure, and cloud environments.

  5. Jan 2021 — Aug 2021

    Penetration Tester

    Cyber Armed Security · United Kingdom

  6. Jun 2020 — Dec 2021

    Penetration Tester

    Freelancer.com · Remote

  7. Feb 2010 — Jun 2021

    Cyber Security Specialist

    Self-employed

  8. Feb 2007 — Jan 2014

    Technical Support Specialist

    Self-employed

Certifications

9 total

OSCE³

Flagship

OffSec

Offensive Security Certified Expert 3 (OSEP + OSWE + OSED)

OffSec's most advanced offensive designation, earned by completing the three expert-level exams below: Experienced Penetration Tester, Web Expert, and Exploit Developer.

OSEPOSWEOSED

CISSP

Certified Information Systems Security Professional

OSCP

Offensive Security Certified Professional

OSEP

Offensive Security Experienced Penetration Tester

OSWE

Offensive Security Web Expert

OSED

Offensive Security Exploit Developer

CNVP

CompTIA Network Vulnerability Assessment Professional

PenTest+

CompTIA PenTest+ (CE)

Security+

CompTIA Security+ (CE)

Published advisories

CVEs and coordinated disclosures, public or post-embargo.

7 total2 high5 medium

Publications & recognition

  • Exploit-DB #52100 — RISE CRM 3.7.0 SQL Injection Exploit2024
  • Hack The Box · RastaLabs completion
  • Training workshops on secure development and pentestingOngoing