This paper presents assessment work and practice of the welfare workers in assessing their service users in various child welfare settings in Sarawak, Malaysia. It draws on a qualitative research based on in-depth interview with respondents selected through purposive sampling. Thematic analysis was one of the major methods of data analysis in the study besides narrative analysis. Findings revealed that assessment work and practice of welfare workers are not being done holistically, thoroughly, and continuously. Issues concerning their assessment work and practice show that the underlying challenges are due to lack of proper training/courses specifically in assessment work provided for them and no assessment framework available as a guideline for their assessment work.