Senior Penetration Tester

Alexander Constantinou

Hard-working, dedicated and passionate cybersecurity professional with a background in Penetration Testing, Threat Intelligence, and Digital Forensics.

Southsea, England, UK
OSCP • OSWE • OSEP • CRTP
Foregenix Ltd
View Experience Blog GitHub

// 01. Experience

Work History

Over a decade of hands-on experience in offensive security, threat intelligence, and digital forensics.

Foregenix Ltd
9 years  •  United Kingdom
Senior Penetration Tester
Jan 2022 – Present  ·  4 yrs+
Penetration Tester
Jan 2019 – Jan 2022  ·  3 yrs
  • Research and map networks internally and externally; identify vulnerabilities and execute organised attacks to compromise systems and gain administrative access.
  • Write bash and python scripts to aid and automate penetration testing tasks.
  • Perform network pivoting and data exfiltration; produce professional reports to help clients remediate risks.
Threat Intelligence Analyst
May 2017 – Jan 2019  ·  1 yr 9 mos
  • Analyse network logs for malicious traffic; deobfuscate PHP and JavaScript malware.
  • Research new attack methods and preventative measures; assist clients in understanding and eradicating discovered threats.
National Guard of Cyprus
2 yrs 1 mo  •  Nicosia, Cyprus
Soldier
Jul 2010 – Jul 2012
  • Worked in a security office during the second year of service.
  • Filed and archived paperwork; organised daily duty timesheets for army personnel.
  • Updated duty records and managed weapon stock counting.

// 02. Education

Academic Background

Formal academic training underpinning hands-on cybersecurity practice.

University of Portsmouth
Master of Science (MSc) — Merit
Cyber Security and Forensic Information Technology
2015 – 2016
Merit Award

// 03. Certifications

Professional Credentials

Industry-recognised certifications spanning offensive security, penetration testing, and digital forensics.

Active
Offensive Security Web Expert
OSWE
Offensive Security Aug 2021
Active
Offensive Security Certified Professional
OSCP
Offensive Security Jan 2019
Active
Offensive Security Wireless Professional
OSWP
Offensive Security Aug 2019
Active
Offensive Security Experienced Penetration Tester
OSEP
Offensive Security Feb 2023
Active
Web Application Penetration Tester
eWAPT
eLearnSecurity Jun 2020
Active
CREST Practitioner Security Analyst
CPSA
CREST Oct 2025 – Oct 2028
Active
CREST Registered Penetration Tester
CRT
CREST Dec 2025 – Dec 2028
Active
Mobile Phone Forensics Practitioner
XRY Forensics
Micro Systemation Mar 2016
Active
Knowledge of Policing (CKP) PASS
CKP
College of Policing Apr 2013
Active
Red Team Operator
RTO
Zero-Point Security Ltd May 2022
Active
Certified Red Team Professional
CRTP
Altered Security Active
Ongoing
Hack The Box
HTB — Hacker Rank
Hack The Box Active

// 04. Courses

Training Completed

Advanced offensive security training courses from Offensive Security.

PEN-300
Evasion Techniques and Breaching Defenses
Offensive Security
AWAE
Advanced Web Attacks and Exploitation
Offensive Security
WiFu
Offensive Security Wireless Attacks
Offensive Security
PWK
Penetration Testing with Kali Linux
Offensive Security

// 05. Skills

Technical Skills

A broad skill set spanning offensive security, forensics, threat intelligence, and scripting.

Penetration Testing
Network Mapping Vulnerability Exploitation Network Pivoting Data Exfiltration Report Writing Active Directory Linux OS Windows OS
Red Teaming
Cobalt Strike Sliver Covenant Empire PoshC2 Threat Modelling APT Emulation Kerberoasting Kerberos Delegation Privilege Escalation UAC Bypasses
Scripting & Automation
Python Bash PowerShell
Digital Forensics
FTK Imager Autopsy XRY Mobile Forensics ACPO Procedures Forensic Imaging (DD)
Threat Intelligence
Network Log Analysis Malware Deobfuscation PHP Malware Analysis JavaScript Malware Analysis Threat Research

// 06. Languages

Language Proficiency

🇬🇧
English
Full Professional Proficiency
100%
🇬🇷
Greek
Native / Bilingual Proficiency
100%

// 07. Contact

Get In Touch

Open to opportunities in offensive security, penetration testing, and security research.

LinkedIn
alexander603558
Location
Southsea, England, UK
Email
Send Email
GitHub
aconstantinou-cmd