It depends on what the company is looking for. Different companies hire Penetration Testers for different domains to be specialized in. Nevertheless, here the some most popular certifications:
- CEH: Certified Ethical Hacker
- CPT: Certified Penetration Tester
- CEPT: Certified Expert Penetration Tester
- GPEN: GIAC Certified Penetration Tester
- OSCP: Offensive Security Certified Professional
- CISSP: Certified Information Systems Security Professional
- GCIH: GIAC Certified Incident Handler
- GCFE: GIAC Certified Forensic Examiner
- GCFA: GIAC Certified Forensic Analyst
- CCFE: Certified Computer Forensics Examiner
- CREA: Certified Reverse Engineering Analyst