The average tenure of a CEO is 8.4 years. A CFO will spend approximately 6.2 years in the position, while a COO lasts 5.5 years. A CISO will spend an average of 1.5 to 2 years before leaving behind the constant stress and urgency of the job. Nearly 17% of CISOs are either medicating or using alcohol to deal with job stress. Others give up altogether, with less than a third remaining in their job for more than three years.”]
Source: https://www.darkreading.com/careers-and-people/ciso-pressures-why-the-role-stinks-and-how-to-fix-it