Employment data from the 1960 and 1970 censuses were organized using the occupational classification system of John Holland to examine age, sex, and level differences in employment and to detect changes over the 10-year period. Data were organized by both kind and level of work in an attempt to answer the following questions: What are the relative frequencies (base rates) of different kinds of work done by men and women? How does the kind of work done differ by level? Are there differences in the kind of work done by people at different ages? and Is the distribution of kinds of work people do changing? Results of the tabulations imply that all categories of work are available to both men and women at the higher educational levels but not at the lower levels. The data also reveal the existence of large sex differences by type of work and level of work within type. Both the 1970 and 1965 tabulations show workers of different ages doing different kinds of work, but the tabulations of age differences for women are not the same as those for men. Finally, trends in the kind of work people do indicate a change in the composition by sex of some occupational categories and also a shift from a technological, thing-oriented occupational structure toward a more extroverted and persuasive or helping workforce. (BM)