Senior Penetration Tester & Red Team Lead

EY; Irvine (CA); On-site; USD 105,000 - 192,000; Full time

Job summary

EY is seeking a Senior Attack & Penetration Tester to drive offensive security engagements across diverse client environments. You will plan, lead, and execute complex penetration tests and red team exercises, applying threat-informed testing aligned with MITRE ATT&CK to identify exploitable paths and remediation opportunities.

You will collaborate with client teams, translate findings into actionable guidance, and mentor junior testers while staying current on emerging vulnerabilities and

Qualifications

• Bachelor's degree in Computer Science, Computer Engineering, Cybersecurity, MIS, IT, Engineering, or related field.
• At least five years of relevant offensive security experience.

Responsibilities

• Plan, lead and execute complex penetration testing and advanced red team engagements.
• Apply threat-informed testing techniques aligned with MITRE ATT&CK.
• Translate testing results into clear, actionable remediation guidance for clients and EY leadership.
• Mentor junior team members and coordinate testing activities within defined rules of engagement.

Skills

Penetration testing

Red team

MITRE ATT&CK

Active Directory

Cloud security testing

Scripting languages

EDR/SiEM familiarity

Team leadership

Networking skills

C2 operations

Education

Bachelor's degree in Computer Science or related field

Tools

Penetration testing tools

Job description

EY is seeking a Senior Attack & Penetration Tester to drive offensive security engagements across diverse client environments. You will plan, lead, and execute complex penetration tests and red team exercises, applying threat-informed testing aligned with MITRE ATT&CK to identify exploitable paths and remediation opportunities.

You will collaborate with client teams, translate findings into actionable guidance, and mentor junior testers while staying current on emerging vulnerabilities and