Hack The Box, a global frontrunner in gamified cybersecurity training and upskilling solutions, has announced the appointment of Gibb Witham as its new President and Chief Financial Officer. Witham joins HTB from Paladin Capital Group, a leading cybersecurity-focused investment firm and an early supporter of HTB. With over $66 million in total funding, HTB continues to expand its mission to equip cybersecurity professionals and organizations around the globe.
HTB has transformed the way cybersecurity readiness is developed, assessed, and scaled worldwide.
Witham brings more than 20 years of experience at the crossroads of finance, strategy, and cybersecurity innovation. In his new role, he will oversee HTB’s global financial operations and drive growth initiatives. His appointment comes at a pivotal moment for HTB, following the strategic acquisition of LetsDefend and the launch of Threat Range—two initiatives that enhance the company’s capabilities in adversary simulation and cyber defense training. These efforts strengthen HTB’s position as a trusted partner for enterprise resilience, breach risk mitigation, and large-scale talent development in cybersecurity.
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“Haris Pylarinos, HTB’s Founder and CEO, said, ‘Gibb combines financial expertise, strategic vision, and deep cybersecurity knowledge. His leadership will be critical as we expand globally and advance our mission to empower the world’s cybersecurity workforce.’”
At Paladin Capital Group, Witham spearheaded investments in fast-growing cybersecurity, AI, and enterprise software companies across the US and Europe, while maintaining close collaboration with HTB’s executive team as a board advisor.
Witham commented, “HTB has truly transformed how cybersecurity readiness is approached and scaled worldwide. I have seen the platform’s impact firsthand and am excited to join Haris and the team at such a transformative time. With AI reshaping both threats and training methods, we have an incredible opportunity to help organizations stay ahead of cyber risks while accelerating professional development for security teams.”
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This appointment follows several strategic leadership moves at HTB, including the addition of Nikos Maroulis as Vice President of AI, Christine Bartlett as Senior Vice President of Marketing, and the promotion of Gerasimos Marketos to Chief Product Officer.
HTB now serves a global community exceeding 4 million cybersecurity professionals, students, and enterprises. Its platform integrates gamified labs, role-specific academies, Capture The Flag (CTF) competitions, advanced certifications, and AI-driven upskilling modules to equip users with the skills needed to tackle evolving cyber threats.
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