In this article, we propose that the major challenge facing career assessme
nt scholars and practitioners in the 21st century is the need to affirm cul
tural diversity. Beginning with a discussion of social constructionist theo
ry, we suggest that existing career assessment practice needs to embrace th
e "local" realities that exist within diverse cultural contexts. We then pr
esent the unificationist perspective as a conceptual lens with which to con
sider career assessment. Building on the need for psychometric tools that c
an address the changing cultural context of career assessment, we also adva
nce generalizability and item response theories as viable approaches to dev
eloping culturally affirming measures and practice standards for diverse cl
ients. The article concludes with an integrative view of how these conceptu
al and methodological tools can enhance career assessment in the 21st centu
ry.