Senior Offensive Security & Penetration Tester

EY; Chattanooga (TN); On-site; USD 120,000 - 160,000; Full time

Job summary

EY is seeking a Senior Attack & Penetration Tester to join its global security practice. You will plan, lead, and execute advanced penetration tests and red team engagements across external networks, AD, cloud, APIs, and mobile apps while applying MITRE ATT&CK-aligned methods.

Expect to mentor junior staff and deliver executive-ready findings to clients. You will work in a dynamic, globally distributed team, collaborating with client technical groups and stakeholders to implement practical

Qualifications

• Experience in planning and leading penetration tests and red team engagements.
• Ability to translate testing results into actionable remediation strategies.
• Familiarity with diverse environments including AD, cloud, web, mobile, and APIs.

Responsibilities

• Plan, lead, and execute complex penetration testing and red team engagements.
• Apply intelligence-led, threat-informed approaches to emulate adversaries.
• Translate findings into clear, actionable remediation and executive summaries.
• Mentor junior team members and contribute to methodology development.
• Coordinate testing activities across client environments and teams.

Skills

Penetration testing

Red team engagements

Threat-informed testing

MITRE ATT&CK

Lead technical testers

Executive communication

Cross-functional collaboration

Tools

Offensive security tooling

Job description

EY is seeking a Senior Attack & Penetration Tester to join its global security practice. You will plan, lead, and execute advanced penetration tests and red team engagements across external networks, AD, cloud, APIs, and mobile apps while applying MITRE ATT&CK-aligned methods.

Expect to mentor junior staff and deliver executive-ready findings to clients. You will work in a dynamic, globally distributed team, collaborating with client technical groups and stakeholders to implement practical