Senior Offensive Security Consultant (Hybrid)

Grant Thornton; Houston (TX); Híbrido; USD 150.000 - 190.000; Jornada completa

Descripción de la vacante

Grant Thornton in Houston seeks a Senior Offensive Security Consultant to lead adversarial testing engagements for clients across various industries. You will simulate real-world attackers, validate detection, and help clients strengthen their security posture through hands-on testing and clear remediation guidance.

From day one you’ll join the Cyber Defense team, collaborating with clients and executives, and mentoring junior staff while helping advance methodologies, tooling, and automation to

Formación

• 3+ years of hands-on experience in offensive security, penetration testing, or red teaming.
• Demonstrated expertise across multiple domains (network, application, cloud, and/or internal infrastructure testing).
• Strong understanding of adversary TTPs and frameworks such as MITRE ATT&CK and ATLAS and OWASP.
• Proficiency with industry‑standard tooling and command‑and‑control frameworks.
• Scripting and automation skills (e.g., Python, PowerShell, Bash).
• Experience conducting assume‑breach or adversary emulation engagements.
• Excellent written and verbal communication skills, including the ability to produce professional, client‑ready reports.
• Ability to work independently, manage multiple engagements, and meet deadlines in a client‑service environment.

Responsabilidades

• Penetration Testing: Plan and execute network, application, API, and cloud penetration tests, from scoping through exploitation, post‑exploitation, and reporting.
• Adversary Emulations: Design and run, threat‑informed attack simulations to validate the effectiveness of client security controls and detection coverage.
• Assume‑Breach: Conduct assume‑breach engagements, collaborating with defensive teams to test detection, response, and containment capabilities.
• AI Red Teaming: Perform adversarial testing of AI/ML systems and LLM‑enabled applications, including prompt injection, model manipulation, data exfiltration, and abuse‑case testing.
• Threat Emulation: Emulate the tactics, techniques, and procedures (TTPs) of relevant threat actors, mapping activity to frameworks such as MITRE ATT&CK.
• Reporting & Communication: Produce clear, high‑quality deliverables that translate technical findings into prioritized, business‑relevant remediation guidance; present results to technical staff, management, and executive/board audiences.
• Client Advisory: Serve as a trusted technical advisor, helping clients understand risk, prioritize remediation, and mature their security programs.
• Practice Development: Contribute to methodology development, tooling, automation, and the mentoring of junior team members.

Conocimientos

3+ years hands-on offensive security

Adversary TTPs and MITRE ATT&CK/ATLAS/

Industry-standard tooling

Scripting and automation (Python/Power

Educación

Bachelor’s degree in Cybersecurity, IT, CS, or related field

Descripción del empleo

Grant Thornton in Houston seeks a Senior Offensive Security Consultant to lead adversarial testing engagements for clients across various industries. You will simulate real-world attackers, validate detection, and help clients strengthen their security posture through hands-on testing and clear remediation guidance.

From day one you’ll join the Cyber Defense team, collaborating with clients and executives, and mentoring junior staff while helping advance methodologies, tooling, and automation to