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Petar Antonic

Petar Antonic

Penetration tester | Cybersecurity Researcher
📍 Belgrade, Serbia · (0) · Member since January 2026
Availability
🏠 Works remotely / from home Yes No
🧰 Travels to client Yes No

Presentation

Cybersecurity researcher acknowledged by U.S Department of Defense (among other notable companies like AT&T, Semrush, Smule etc) for disclosing a number of vulnerabilities on DoDs systems via Hackerone bug bounty platform.

For deliverables, professional reports are created, that will outline every vulnerability found, proofs-of-concept, and solutions on how to fix the discovered vulnerabilities. Each report not only meets but exceeds requirements for compliance auditors.

Core competency is performing black and gray box testing on live web applications/networks or lab environments. Familiar with all common attack vectors and mitigation techniques, as well as finding unknown to public exploits known as 0days in web applications. Even though most of the work is confidential sample vulnerability report can be provided.

Service Description

1)Web Application Penetration Testing aligned with OWASP Top 10 and PTES
2)Mobile Application Penetration Testing aligned with OWASP Top 10 and PTES
3)Network Penetration Testing aligned with PTES
4)Security Hardening and Configuration Review

Pentesting tools: BurpSuite Professional, OpenVAS, Nmap, Metasploit, Mimikatz, Impacket Framework , Nuclei, Custom Python scripts
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Offered services

2 services
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Background

Cybersecurity Expert
Cedars Internaltional D.O.O · 01/04/2024 – 31/07/2025
Served as a cybersecurity expert on a multi-national critical infrastructure protection project. Contributed to the assessment of cybersecurity maturity across government ministries and infrastructure providers, participated in the development and delivery of recommendations and best practices, and collaborated on comprehensive transformation strategies covering process improvement, technology modernization, training, and standardization. As a member of the Cyber Threat Intelligence (CTI) team, supported research, threat assessments, and the development of intelligence reports.
Penetration Tester
MultiBank Group · 01/10/2020 – 15/01/2021
Penetration testing of web assets.
Penetration Tester | Cybersecurity Advisor
Mbanq · 01/04/2018 – 01/04/2022
Penetration testing and vulnerability assessment of products (web) and networks for Germany, Croatia and Montenegro offices.
Penetration Tester
Infosec Partners · 01/12/2016 – 01/02/2018
Penetration testing of web applications and internal networks.
Bachelor of Engineering (BEng), Informational Technologies
University of Belgrade · 2010 – 2014
🇬🇧English
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Working hours

Monday
From08h00To22h00
Tuesday
From08h00To22h00
Wednesday
From08h00To22h00
Thursday
From08h00To22h00
Friday
From08h00To22h00
Saturday
From08h00To22h00
Sunday â–ª Today
From00h00To22h00

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