All the actuarial organizations I know of are non-profits which means their 990 forms are on http://www.guidestar.org and their 5500 forms, if they have pensions, are on http://www.efast.dol.gov. Going over this data two things stand out.
1) These places pay pretty well judging by the salary of the highest paid official from each:
2) It is 401(k) plans in which they have the vast majority of their pension money:
and those two organization that do maintain supplemental Defined Benefit plans have them very well funded: