Curriculum vitae

Diego Fidalgo

Senior Cybersecurity Consultant | Pentester

Profile

I am a Senior Ethical Hacker and Red Team Specialist with 4+ years of dedicated cybersecurity experience, spanning offensive security, penetration testing, and adversary simulation across corporate environments of every shape and size. My comfort zone is Active Directory, but I also spend a healthy amount of time in web and mobile application security, cloud environments, and testing EDR solutions to see how much noise (or silence) they generate when I misbehave.

Experience

Senior Cybersecurity Consultant | Pentester

Áudea · 01/2026 - Present · Remote

  • Perform security assessments for multiple clients across web applications, cloud environments, internal and external infrastructure, Active Directory, and EDR solutions on different operating systems.
  • Manage the full lifecycle of offensive security testing for a global client with more than 10 entities across different locations: scoping, effort estimation, testing, reporting, and presenting the results.
  • Carry out penetration tests and security reviews using widely adopted tools and methodologies, adapting the approach to each environment and engagement.
  • Test the effectiveness of EDR solutions against various attack techniques and flag where detection and response could actually improve.
  • Contribute to a banking client cyberintelligence and threat monitoring service built on Recorded Future, producing periodic briefings on threat actor activity, critical vulnerabilities, the ransomware landscape, and geopolitical risk.
  • Present findings and recommendations in a clear, practical way, helping clients understand risk and prioritize remediation.

Senior Ethical Hacker

Cipher · 09/2024 - 01/2026 · Remote

  • Conducted advanced security assessments and Red Team exercises in complex corporate environments, covering Active Directory, web applications, and internal networks.
  • Designed and implemented custom security strategies using ethical hacking techniques and industry standard methodologies (OWASP, MITRE ATT&CK).
  • Collaborated with presales and consulting teams to shape cybersecurity solutions around each client risk profile.
  • Led and coordinated multidisciplinary Red Team projects: timelines, task allocation, and quality control.

Ethical Hacker

Cipher · 05/2023 - 09/2024 · Remote

  • Conducted audits and penetration tests across infrastructure, web and mobile applications, networks, and Active Directory environments.
  • Ran external and internal penetration tests, identifying critical risks and proposing mitigations that clients could realistically implement.
  • Deployed, managed, and ran automated pentesting workflows using Pentera.
  • Wrote reports detailing findings, risks, and remediation recommendations for technical and non-technical stakeholders.

IT Auditor

Cipher · 09/2022 - 05/2023 · Remote

  • Developed IT and OT system auditing frameworks based on recognized standards (NIST, ISO 27001).
  • Provided consulting on network architecture improvements and securing communications infrastructure.
  • Conducted risk assessments and contributed to risk management strategies.
  • Led continuous improvement initiatives for internal management systems.

IT Risk Consultant

PwC · 03/2022 - 07/2022 · Madrid

  • Provided cybersecurity consulting for clients across multiple industries, including banking and financial services.
  • Conducted compliance audits aligned with banking sector cybersecurity regulations.
  • Developed frameworks for banking regulations and fraud control, with a cybersecurity first lens.
  • Supported the rollout of cybersecurity best practices.

Certifications

  • HTB Certified Offensive AI Expert (COAE) Hack The Box · 30/10/2026
  • Kubernetes Red Team Analyst (K8s-RTA) Cyberwarfare Labs · 04/10/2026
  • Certified Azure Red Team Professional (CARTP) Altered Security · 15/06/2026
  • Certified WiFiChallenge Professional (CWP) WiFiChallenge Academy · 26/01/2026
  • Certified Red Team Professional (CRTP) Altered Security · 09/11/2025
  • AI Red Teamer Job Role Path ("AI Ninja") HTB Academy · 12/2025
  • Certified Ethical Hacker Master (CEH Master) EC-Council · 25/06/2025
  • Certified Red Team Analyst (CRTA) Cyberwarfare Labs · 25/11/2024
  • INE Certified Cloud Associate (ICCA) INE · 28/03/2023
  • eLearn Junior Penetration Tester (eJPTv2) INE · 20/03/2023

Skills

Penetration testing and red team
External and internal pentests, vulnerability assessment, adversary simulation, attack surface analysis, red team operations, MITRE ATT&CK based campaign design.
Active Directory
Enumeration, privilege escalation, lateral movement: BloodHound, Rubeus, Mimikatz, PowerSploit, Impacket, NetExec, Certify.
Web and mobile
OWASP Top 10, Burp Suite, SQLmap, Feroxbuster, MobSF, Frida.
Cloud and Kubernetes
Cloud security assessments on Azure and AWS, EDR evasion and detection testing, Kubernetes internals (BadPods, RBAC privilege escalation, container escape, secrets exposure, etcd).
Social engineering and physical
Phishing campaigns, QRishing, piggybacking and physical access testing, including critical infrastructure environments.
C2 frameworks
Havoc, Empire, Metasploit.
AI red teaming
Prompt injection, model evasion, data tampering, LLM security evaluation, plus using AI day to day to speed up recon, reporting, and tooling.
Scripting
Python, Bash, PowerShell.
Tools and frameworks
Pentera, Horizon3, Nessus, Nmap, Nuclei, TestSSL, MITRE ATT&CK, OWASP, OSSTMM, PTES, TLPT.

Education

  • Master's Degree in Cybersecurity Universidad de Alcalá de Henares · 10/2021 - 07/2022
  • Bachelor’s Degree in Computer Engineering Universidad de Salamanca · 09/2017 - 09/2021

Languages

  • Spanish Native
  • English Advanced professional
  • French Basic professional

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