OffSec (formerly Offensive Security) is a leading provider of cybersecurity training, certifications, and the developer of Kali Linux. The company is known for its "hands-on" approach and realistic practical exams, where professionals must actively find and exploit vulnerabilities.

Key aspects of OffSec:

• Certifications: OffSec is globally best known for their OSCP (Offensive Security Certified Professional), a highly respected, practical certification for penetration testers. 
• Training & Labs: OffSec offers various courses and practice environments (Proving Grounds) for ethical hacking, red teaming, incident handling, and application security. 
• Kali Linux: OffSec develops and maintains Kali Linux, the most widely used operating system for penetration testing and security audits. 
• Goal: The goal is to train security professionals to think and act proactively, just like attackers, to identify vulnerabilities before they can be exploited. In short, OffSec is synonymous with high-quality, practical training for ethical hackers and penetration testers, but nowadays also for incident handlers, threat hunters, and SOC staff. 

TSTC is a Learning and Reselling partner of Offsec. This means that our classroom Offsec training always uses the most up-to-date, official teaching materials and slides, and we can also assist you with the official Offsec licenses for self-study training and exam vouchers.