It seems that CEH, CISSP, and CISM are one of the most cost-benefit combinations for security professionals to invest. (Please be reminded that the table lists only part of the DoD 8570 Approved Baseline Certifications.)
- https://www.sans.org/dodd-8570/
- https://www.esd.whs.mil/Portals/54/Documents/DD/issuances/dodm/857001m.pdf