CybersecurityEngineer

/ SOAR Team Lead
/ Security Automation
/ Cybersecurity & AI-Oriented

BasedinBarcelona

I’m a cybersecurity engineer who builds
intelligent solutions to solve complex
security problems.

About Me

I’m Martí Castell Guerrero, a Cybersecurity Engineer with 3+ years of experience in the tech industry, leading cybersecurity teams and driving defensive security initiatives. I’m passionate about Blue Team security and always looking to deepen my understanding of the field and explore new ways to tackle security challenges.

I’m particularly interested in the intersection of cybersecurity and AI, and how it can shape the future of the industry. I enjoy learning, experimenting with new technologies, and understanding how to apply them to build stronger, more effective defenses.

Languages

Catalan— Native
English— Fluent
Spanish— Native
French— Basic

Studies

Master of Engineering in CybersecurityInternational University of La RiojaMaster of Engineering in CybersecurityGPA: 9.1/10.0

Bachelor of Science, Computer Science and EngineeringAutonomous University of BarcelonaBachelor of Science, Computer Science and EngineeringGPA: 8.0/10.0

Experience

Cybersecurity Engineer, SOAR Team LeadEYBarcelona, SpainSep 2024 – PresentLeading SOAR automation and AI integration to strengthen threat detection on a multi-client SOC.
- Cybersecurity
- Threat Detection
- Security Automation
- AI Integration
- Led SOAR automation for a 30+ client SOC using Splunk SOAR and Python, managing a team of 6 engineers, developing automated workflows and AI modules to reduce response times and automatically detect, analyze and contain cybersecurity threats, preventing incidents and saving the company ∼3.4M €/year.
- Implemented internal tools to help cybersecurity analysts detect and investigate threats by integrating platforms such as Microsoft Defender, CrowdStrike, among others.
- Built a phishing detection tool that analyzes email data and applies AI to classify email messages.
- Handled diverse cybersecurity incidents, mitigating risks to clients by detecting and addressing threats early using various cybersecurity tools.
Software EngineerHPSant Cugat del Vallès, SpainFeb 2024 – Aug 2024Improving engineering efficiency through high-performance data processing and virtual testing solutions, while reducing operational costs.
- Multithreading
- Performance Optimization
- Data Processing
- API Integration
- Optimized a Python script that daily extracts and processes 40M+ HP EMEA JIRA issues, cutting execution time by 94% (7-8 hours to 22-24 minutes) via multithreading and parallel tasks, allowing project managers to track project metrics and identify team bottlenecks more efficiently.
- Integrated an industrial large-format printer simulator with an internal C# tool to reach and modify printer states and configuration data via REST APIs, supporting virtual testing and reducing costs by minimizing reliance on physical printer tests.
Software Engineer InternApplus+ LaboratoriesSant Cugat del Vallès, SpainNov 2023 – Jan 2024Driving system migrations and feature development for internal tooling.
- Backend Development
- Database Design
- System Architecture
- Led the migration from Chart.js to LightningChart (JavaScript charting library), minimizing disruption while enabling stable real-time visualization of detailed data for mechanical component testing. (10k+ data points/s)
- Implemented new features for an application that generates ENAC certifications and restructured data persistence by moving static data into a database to improve scalability and maintainability. (C#, Azure SQL Database)
Software Engineer InternO&S ConsultoresBarcelona, SpainMar 2023 – Sep 2023Administering databases and developing new features for enterprise ERP systems.
- Database Administration
- ERP Systems
- Administered Oracle databases and built/maintained database objects to improve performance and data integrity.
- Implemented new features in an ERP system and refactored the codebase using JavaScript and XSQL.