If private industry were the military, most companies would be headed by O5 or O6; the scope of duties and responsibilities of an eg VP or CFO are actually quite comparable to a lt colonel or navy commander, CEOs are fairly like captains & colonels. These ranks are enough to head a large ship, air base, or training facility with hundreds or thousands under their command. Only extremely large companies (50k+ employees) have anything with a role comparable to admirals or generals.