Stephani Guimaraes Lima

Lead complex investigations involving malware, phishing, identity compromise, credential abuse, suspicious authentication, and malicious infrastructure across enterprise environments. Correlate telemetry with OSINT and map attacker behavior to MITRE ATT&CK.

Serve as a Technical Mentor for the SANS WiCyS Security Training Scholarship Program, guiding cybersecurity professionals through technical investigations, CTF challenges, hands-on security labs, and GIAC certification preparation.

Conducted high-volume investigations across endpoint, identity, email, network, and cloud environments using CrowdStrike, Microsoft Defender, SentinelOne, Carbon Black, Microsoft Sentinel, and Splunk. Performed OSINT and indicator enrichment to establish threat context.

Supported Microsoft Sentinel and Splunk environments collecting security telemetry across enterprise customer networks. Troubleshot Linux-based collectors, ingestion pipelines, and telemetry issues.

Provided technical support services.

Provided technology consulting and support services to customers.

Coordinated marketing activities and campaigns.

Certificate in Neuromarketing from ESPM in São Paulo, completed in 2013.

Bachelor of Science in Marketing and Advertising from UAM in São Paulo, Brazil, completed in 2011.

Earned CompTIA certifications including Security+, Network+, A+, ITF+, and SecAI+.

Earned Microsoft MS-900 certification for Microsoft 365 fundamentals.

Earned Palo Alto Networks Certified Cybersecurity Entry-Level certification.

Earned certifications in incident handling, security essentials, and foundational cybersecurity technologies.

Earned certifications in incident handling, security essentials, and foundational cybersecurity technologies.

Earned certifications in incident handling, security essentials, and foundational cybersecurity technologies.