David DeWalt is a rare triple-play cybersecurity operator-investor who served as CEO of both McAfee and FireEye before becoming a cyber-focused venture investor at AllegisCyber and NightDragon, giving him unusually deep hands-on operating experience in the exact domain he invests in. He combines an operator's scale background with a specialized, cyber-only investing focus, giving founders access to an investor who not only focuses exclusively on security but has personally run some of the sector's most recognizable companies. David DeWalt is a rare triple-play cybersecurity operator-investor who served as CEO of both McAfee and FireEye before becoming a cyber-focused venture investor at AllegisCyber and NightDragon, giving him unusually deep hands-on operating experience in the exact domain he invests in. He combines an operator's scale background with a specialized, cyber-only investing focus, giving founders access to an investor who not only focuses exclusively on security but has personally run some of the sector's most recognizable companies.