Penetration Tester
Open To Work
Atharva Kulkarni
Eurostop
London,Ealing
Work Preference
Job Search Status:
Open to work
Desired Job Title
Penetration Tester
Work Type
Full Time
Location Preference
On-SiteRemoteHybrid
Location:
London, Ealing, UKUnited Kingdom
Open to relocation:
Yes
Important To Me
Career advancementCompany Culture
3
Years of experience
3
Certification
CEH V12 certified with a GCHQ-accredited MSc in Applied Cyber Security, moving into offensive security and penetration testing. Three years of enterprise IT and infrastructure experience across Windows, Active Directory, endpoint compliance and networking, now applied to security assessment of production systems — identifying vulnerabilities, tracing root causes and driving fixes to closure with the teams who own them. Builds and ships security tooling: a 50+ tool client-side toolkit with 240 automated tests, and a multi-agent automation framework. Top 2% on TryHackMe across 131 completed rooms, with an offensive MSc dissertation applying generative adversarial networks to hardware security primitives. Working knowledge of OWASP Top 10, MITRE ATT&CK and the Cyber Kill Chain. Targeting penetration testing and red team operations.
Work History
1 Year 1 Month
09.2025 - Current
1 Year 1 Month
Technical Support Analyst
Eurostop
09.2025 - Current
- Conduct ongoing security assessments of internal systems including a cloud-based POS platform, stock control system, internal integrations and a locally hosted LLM service, identifying vulnerabilities and contributing to the organisation's security posture.
- Deliver end-to-end support for enterprise EPOS platforms, overseeing transactional and operational data flow across in-store systems, middleware, head-office platforms and third-party integrations.
- Diagnose and resolve data consistency, pricing and product-life cycle issues through cross-system analysis, identifying root causes, discrepancies and process failures within large data sets.
- Support external system integrations, incident investigation and operational controls, ensuring secure access, reliable synchronisation, data integrity and continuity across retail environments.
7 Months
02.2025 - 09.2025
7 Months
DSS Engineer
Diageo
02.2025 - 09.2025
- Implemented and advised on security-focused endpoint management, including Intune-Autopilot integration, tenant lock and device compliance enforcement, strengthening asset protection and reducing exposure.
- Resolved issues across Active Directory, authentication, Wi-Fi and device compliance; contributed to Zero Trust-aligned access controls and centralised asset tracking via Nexthink and ServiceNow.
- Delivered frontline IT support for enterprise users across hardware, network, Windows OS and application-level issues, focused on asset security and user account management.
1 Year
01.2024 - 01.2025
1 Year
Technical Support Engineer
Concentrix
01.2024 - 01.2025
- Advised customers on cybersecurity scams and phishing techniques, reducing security breaches and raising cyber awareness across a broad customer base.
- Provided technical support to BT Broadband customers, improving query resolution efficiency by 35%.
- Troubleshot broadband services, mobile telephony and home tech products, producing an 80% decrease in escalated tickets.
6 Months
01.2022 - 07.2022
6 Months
Network Operations Specialist
Clariant India Ltd | Mumbai
01.2022 - 07.2022
- Enhanced organisational security through endpoint security configurations, contributing to a 25% decrease in security breaches and a 20% reduction in security incidents.
- Maintained and configured network switches and routers; developed cybersecurity awareness training, increasing employee security awareness by 15%.
- Provided technical support via ServiceNow, reducing network outage response time by 30% and configuring over 250 machines.
Education
MSc - Applied Cyber Security
Queen’s University Belfast | 01.2023
GCHQ-accredited. Modules: Network Security & Monitoring, Malware Analysis, Software Assurance, Computer Forensics, Applied Cryptography. Dissertation: Machine Learning Attacks on Physical Unclonable Functions.
BSc - Computer Science
Pillai’s College of Arts, Commerce and Sciences | 01.2022
Core modules in network technologies, routing protocols, Cisco network infrastructure and network security.
Skills
Offensive Security: Penetration Testing
Vulnerability Assessment
Network & Host Enumeration
Manual Exploit Identification
Red Team Concepts
CTF & Lab Practice
Web & Application: OWASP Top 10
Burp Suite
Certification
- Certified Ethical Hacker (CEH V12) — EC-Council
- Cyber Security 101 (SEC1) — TryHackMe, 2026
- Pre Security (SECO) — TryHackMe
- Fortinet NSE Level 1 — PggZRhVh2p
- Fortinet NSE Level 2 — uTMYfCWHcd
- TryHackMe Junior Penetration Testing Path — in progress, top 2% globally, 131 rooms completed
Security Tooling & Automation
- Client-Side Security Toolkit
- Built and maintain a browser-based toolkit of 50+ self-authored security tools: encoding and cipher analysis, hash identification and cracking, JWT / AES / RSA and X.509 inspection, CVSS 3.1 scoring, secret scanning, steganography, homoglyph detection and SPF / DKIM / DMARC / BIMI email-authentication analysers.
- 240 automated tests, verified against RFC 4648, FIPS 180-4 and RFC 4231 published vectors. Integrated the CyberChef engine (505 operations) to run fully client-side under a custom interface.
- AI Agent Orchestration Framework — github.com/atharvak161/cloude-org-framework
- Designed and maintain a multi-agent operating framework of 89 role-scoped agents across 12 departments, with enforced review gates, security sign-off before release and structured audit logging.
- Cybersecurity Knowledge Base
- Authored and published a 248-note reference base covering cloud security, GRC, OSQP preparation and red-team technique, with full-text search and cross-linking.
Projects
- Machine Learning Attacks on Physical Unclonable Functions | MSc Dissertation 2023, Investigated machine learning vulnerabilities in hardware security primitives. Employed generative adversarial networks to synthesise PUF challenge-response pairs, enabling modelling attacks and evaluation of countermeasures. Offensive security research at graduate level.
- Honey Encryption: Enhancing Password-Based Security | Queen’s University Belfast 2023, Investigated Honey Encryption as a defence against brute-force attacks on password-protected systems. Designed a framework and developer API generating realistic decoy plaintext on incorrect password attempts.
- Digital Forensics: NTFS File Recovery | Queen’s University Belfast 2023, Forensic investigation of deleted file recovery on Windows 10 NTFS using command-line tools, disk imaging, MFT analysis and slack space examination. Applicable to incident response and data breach investigation.
Timeline
Technical Support Analyst
Eurostop
09.2025 - CurrentRead more
DSS Engineer
Diageo
02.2025 - 09.2025Read more
Technical Support Engineer
Concentrix
01.2024 - 01.2025Read more
Network Operations Specialist
Clariant India Ltd
01.2022 - 07.2022Read more
Pillai’s College of Arts, Commerce and Sciences - BSc, Computer Science
Read more
Queen’s University Belfast - MSc, Applied Cyber Security
Read more