Marcelo Lima
GSI Systems Engineer at Palo Alto Networks
Tampa, Florida, United States
Summary
🤩
Rockstar🎓
Top SchoolMarcelo Lima is a seasoned systems engineer with 12 years of experience delivering security solutions and technical enablement for global service providers and MSSP partners, currently focused on Palo Alto Networks' GSI accounts. He blends pre-sales consulting, onsite and remote demos, and go-to-market support with deep hands-on offensive security expertise evidenced by significant contributions to high-profile open-source tools like CrackMapExec and SILENTTRINITY. Comfortable across cloud, network, and endpoint security, Marcelo also automates red-team infrastructure and builds backend tooling (Python, C#, Nim) for post-exploitation and reconnaissance workflows. His background in training and channel enablement underscores a talent for translating complex technical concepts into practical, deployable solutions. Based in Tampa, he pairs enterprise sales engineering with an unconventional hacker’s mindset—often weaponizing niche languages and tooling to stress-test defenses.
12 years of coding experience
16 years of employment as a software developer
Bachelor Information Technology, Bachelor Information Technology at Universidade Santa CecíliaB.S. Cybersecurity and Information Assurance Cybersecurity, B.S. Cybersecurity and Information Assurance Cybersecurity at Western Governors University
Spanish, Portuguese, English
Github Skills (88)
shellcode10
penetration-testing10
python10
wp-api10
vulnerability-scanners10
windows10
databases10
authentication10
bash10
winapi10
terraform10
chromeless10
security10
asp-net10
automation10
Programming languages (17)
Github contributions (5)
byt3bl33d3r/SILENTTRINITY
Oct 2018 - Oct 2020
An asynchronous, collaborative post-exploitation agent powered by Python and .NET's DLR
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:171 commits, 53 PRs, 166 pushes in 2 years
Contributions summary:Marcelo significantly contributed to the core functionality of the SILENTTRINITY project. Their work involved the implementation of new modules, and updates to existing modules. They also refactored the C# stage code and contributed to improvements in the C2 HTTP JSON API and support for Encrypted Key Exchange (EKE). Further work included adding new module such as a module to dump the Vault credentials.
pythondlrred-teamsc-sharps-net
byt3bl33d3r/WitnessMe
Jul 2019 - Oct 2020
Role in this project:Back-end Developer
Back-end DeveloperContributions:77 commits, 5 PRs, 67 pushes in 1 year 3 months
Contributions summary:Marcelo was primarily involved in the development and maintenance of the back-end functionality of the web inventory tool. Their contributions include implementing the core logic for taking screenshots of webpages, integrating database interactions, and refactoring the codebase to improve reliability and efficiency. They worked extensively with Python, integrating Pyppeteer (a headless Chrome/Chromium) for screenshot capture and a database for storing the results. They also implemented a task queue to improve performance by using a producer/consumer model.
screenshotwebpagespyppeteerchromiumosint
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