Intelligence Community/Security Services background, relevant certifications such as those offered by Offensive Security (OSCP, OSEP, OSED, OSEE, OSCE), CREST (Certified Simulated Attack Specialist, Registered Penetration Tester, Certified Infrastructure Tester), SANS (GPEN, GXPN, GWAPT), knowledge of malware packing, obfuscation, persistence, exfiltration techniques, and understanding of financial sector or other large security and IT infrastructures . Technical knowledge or experience developing proof of concept exploits and in house scripting, using interpreted languages such as Python, Ruby, or Perl, compiled languages such as C, C++, C#, or Java, and security tools or technology such as Firewalls, IDS/IPS, Web Proxies, DLP and the ability to articulate and visually present complex penetration testing and Red Team/Purple Team results is highly desirable .