This is a corpus consisting of selected sections (i.e., Abstract, Methods and Results) of scientific research articles concerning occupational exposures to two different types of substance, i.e., diesel exhaust (51 articles) and respirable crystalline silica (RCS) (50 articles). The article sections have been annotated by experts in the field with 6 categories of named entities (NEs) relevant to the assessment of occupational substance exposures, particularly in the context of Job Exposure Matrices (JEMs). The corpus is available in two different formats, brat standoff format and JSON. The corpus and associated NER models are described in more detail in the following atricle, which should be cited if you use the corpus: Thompson, P., Ananiadou, S., Basinas I., Brinchmann, B. C., Cramer, C., Galea, K. S., Ge, C., Georgiadis, P., Kirkeleit, J., Kuijpers, E., Nguyen, N., Nuñez, R., Schlünssen, V., Stokholm, Z. A., Taher, E. A., Tinnerberg, H., Van Tongeren, M. and Xie, Q. (2024). Supporting the working life exposome: annotating occupational exposure for enhanced literature search. PLoS ONE 19(8): e0307844