Leonardo Oi

Leonardo Oi Email and Phone Number

Principal Cyber Security Consultant and Penetration Tester @ OiSecurity
Santo André, SP, BR
Leonardo Oi's Location
Santo André, São Paulo, Brazil, Brazil
About Leonardo Oi

Cybersecurity professional with 3 years of experience, specialized in information security, with an emphasis on Offensive Security.I have worked on more than 30 international projects as a Pentester, focusing on different compliances, such as PCI-DSS and GDPR where I obtained the following results:- Identification of critical vulnerabilities;- Improvement in the quality of official reports;- Increased efficiency and quality of consultancy services;- Implementation of internationally recognized methodologies;- Reduction in the number of false positives (manual and automated).I have also worked in internal security as a Security Engineer, where I had the opportunity to achieve the following results:- Development, implementation and monitoring of defense and security mechanisms;- Creation and implementation of security policies;- Installation, maintenance and operation of monitoring software;- Improvement of internal processes;- Management of several endpoints, VPSs, internal and external networks;- Configuration of VPNs for remote access;- Management, implementation and operation of environments and resources in the Cloud (Azure).I am always seeking to improve my knowledge in the area of ​​Cybersecurity and Information Security.I have had a diverse range of valuable experiences in an international startup, where I was mentored by one of approximately 260 holders of the GSE (GIAC Security Expert) certification, who recognized and approved my efforts throughout my years of experience.I believe that information security and cybersecurity are not only about policies, procedures and risk management, but also about people. A rich, dynamic and assertive environment makes all the difference.

Leonardo Oi's Current Company Details
OiSecurity

Oisecurity

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Principal Cyber Security Consultant and Penetration Tester
Santo André, SP, BR
Leonardo Oi Work Experience Details
  • Oisecurity
    Principal Cyber Security Consultant And Penetration Tester
    Oisecurity
    Santo André, Sp, Br
  • Instituto De Defesa Cibernética
    Member Of The Public Committee
    Instituto De Defesa Cibernética Jul 2024 - Present
    Brazil
    The Cyber ​​Defense Institute (IDCiber) was created in 2023, born from the DCiber.org Project created in 2021, which is now the news and articles arm. Cyber ​​defense is a critical field for protecting systems, networks, and data against malicious cyber attacks. With society's increasing dependence on technology and the internet, it has become essential to establish robust measures to ensure digital security. This is especially relevant for governments, companies, and organizations that deal… Show more The Cyber ​​Defense Institute (IDCiber) was created in 2023, born from the DCiber.org Project created in 2021, which is now the news and articles arm. Cyber ​​defense is a critical field for protecting systems, networks, and data against malicious cyber attacks. With society's increasing dependence on technology and the internet, it has become essential to establish robust measures to ensure digital security. This is especially relevant for governments, companies, and organizations that deal with sensitive and secure information.At the Cyber ​​Defense Institute, we are a team passionate about protecting the digital world and ensuring the security of data and information restricted to individuals, companies, and organizations. We believe that a secure cyber environment is essential for the progress and prosperity of modern society. Show less
  • Cybernetik.Co
    Cyber Security Analyst | Security Engineer
    Cybernetik.Co Aug 2022 - Present
    Brazil
    As the company's first cybersecurity professional, I worked as a Mid-Level/Senior Pentester, participating in more than 30 international projects for major players in the financial, automotive, technological innovation and healthcare markets.I performed penetration testing on web applications, mobile applications, internal networks, external networks, VPNs and robust applications, often associating vulnerabilities with the 6 PCI-DSS objectives.I also conducted source code-based… Show more As the company's first cybersecurity professional, I worked as a Mid-Level/Senior Pentester, participating in more than 30 international projects for major players in the financial, automotive, technological innovation and healthcare markets.I performed penetration testing on web applications, mobile applications, internal networks, external networks, VPNs and robust applications, often associating vulnerabilities with the 6 PCI-DSS objectives.I also conducted source code-based testing, where I was able to improve my skills in:- SAST (Static Application Security Testing)- DAST (Dynamic Application Security Testing)- SCA (Software Composition Analysis)I participated in the development of the company's internal security and operational maturity, with the opportunity to implement, develop, install, configure and monitor the following tools, frameworks and corporate policies:- Wazuh, for endpoint monitoring and alerts;- PFSense, as an edge firewall;- FleetDM, as a device management system;- ElasticSearch, for collecting and processing logs and alerts;- Kibana, for creating and visualizing data;- VMWare ESXi, for managing virtual machines and virtualized networks;- Azure Cloud, AWS and Hetzner, for managing VPSs and cloud assets;- AttackForge, PlexTrac and PwnDoc, for generating and managing reports and vulnerabilities;- Cloudflare management;- Linux and Windows servers;- Internal policies and processes;- Internal audit;- Among others.I have always applied and followed the most recognized methodologies in the market, such as OWASP, NIST and MITRE, with a main focus on compliance related to financial transactions, such as PCI-DSS.I have developed essential technical and interpersonal skills to work in the international and national markets, with a diversified portfolio of knowledge, certifications and a mindset focused on excellence. Show less
  • Dbmx Negócios Ltda
    Intern Cybersecurity Analyst
    Dbmx Negócios Ltda Sep 2021 - Aug 2022
    Campo Belo, Sp
    DBMX is a new organization on the market, which aims to work with cybersecurity and also provide opportunities for young people in practical learning through internships mainly in the technological area.

Leonardo Oi Education Details

Frequently Asked Questions about Leonardo Oi

What company does Leonardo Oi work for?

Leonardo Oi works for Oisecurity

What is Leonardo Oi's role at the current company?

Leonardo Oi's current role is Principal Cyber Security Consultant and Penetration Tester.

What schools did Leonardo Oi attend?

Leonardo Oi attended Descomplica, Universidade Anhembi Morumbi, Etec De Rio Grande Da Serra.

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