The OffSec Experienced Penetration Tester (OSEP) is based on the PEN-300 course and addresses advanced techniques around antivirus evasion, Active Directory attacks, and living-off-the-land methods. The fully practical 48-hour exam (47:45 hrs exam + 24 hrs report) in a simulated enterprise environment is the key difference from knowledge-based certifications—it tests real attack capabilities. OSEP is considered credible proof of high-level offensive competence in red team circles, but requires solid OSCP knowledge. Together with OSED and OSWE, OSEP forms the OSCE³ trio.