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Denin Sajan, Independent Security Researcher

Denin Sajan

Independent Security Researcher·Self Employed

India

Master's degree, Cyber Security

Work experience

Total years of experience: 2 years, 7 months

Independent Security Researcher

December 2025 - Present

Self Employed

Cochin, India

December 2025 - Present

• Deployed Zabbix SIEM on Ubuntu Server, simulated SSH brute force attacks from Kali Linux using
Hydra, investigated alerts in real time, and produced SOC-style incident reports—building practical
expertise in threat detection, log analysis, and incident response.
• Completed EY Technology Risk and Deloitte Cyber Security Big 4 simulations; obtained Qualys
EDR specialist certification; published security projects on GitHub.
Company industry:
Cyber & Network Security

Duty Manager

December 2023 - December 2025

Bistrot Pierre

United Kingdom

December 2023 - December 2025

• Primary escalation point for operational and technical issues across 24/7 rotating shifts—triaged
problems, coordinated resolution with vendors, and documented all actions in working logs.
• Produced daily structured reports for senior management—consolidating operational data and
presenting findings in a clear, decision-ready format.
• Enforced access controls and maintained compliance records across a team of 15+ throughout tenure.
Company industry:
Catering, Food Service, & Restaurant

Education

University of Hertfordshire

November 2023

November 2023

Master's degree, Cyber Security

United Kingdom

Mahatma Gandhi University

December 2018

December 2018

Bachelor's degree, Computer Science

India

Skills

GITHUB

Intermediate

GOVERNANCE RISK MANAGEMENT AND COMPLIANCE

Intermediate

INFORMATION SECURITY MANAGEMENT

Intermediate

KALI LINUX

Intermediate

LINKEDIN

Intermediate

MITRE ATT&CK FRAMEWORK

Intermediate

SIMULATED ANNEALING

Intermediate

UBUNTU OPERATING SYSTEM

Intermediate

COMPUTER SCIENCE

Intermediate

CROSS FUNCTIONAL COORDINATION

Intermediate

CYBER SECURITY

Intermediate

INFORMATION TECHNOLOGY OPERATIONS

Intermediate

ISO IEC 27001

Intermediate

OPERATIONS

Intermediate

PROJECT RISK MANAGEMENT

Intermediate

ROOT CAUSE ANALYSIS

Intermediate

STAKEHOLDER COMMUNICATIONS

Intermediate

TELEPHONE TRIAGE

Intermediate

Social profiles

Languages

English

Expert

Training and Certifications

Certifications
Field Technician —Networking & Storage
Google Introduction to AI
CCNA — Cisco Certified Network Associate
SAL1 — Security Analyst Level 1
— Cyber Security Job Simulation
— Technology Risk Job Simulation
— Cybersecurity Fundamentals
Qualys Certified Specialist — EDR
Field Technician - Networking and Storage
CCNA