If you have good skills and practical knowledge, you don't need any certifications. But to make your profile better or to learn the skills required for this job, you can look into the following Certification Program:
- 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
- CVA: Certified Vulnerability Assessor