The NSW Environmental Defender's Office acted on behalf of NHVSS in appealing the "Stoneco Pty Ltd" limestone quarry approval by the Upper Hunter Shire Council.

[28] During 2018 the society assisted on palaeontology research expeditions to caves in the Upper Hunter Valley NSW Australia, resulting in discoveries of significant Quaternary fossils, including five extinct Pleistocene megafaunal taxa.

[29] A number of other research projects (e.g. bat monitoring and groundwater fauna) have been undertaken by the society at various cave and karst locations in NSW.

[citation needed] Since 2011, the speleological society has regularly assisted Newcastle University lecturers, by guiding geology students through the Timor Caves, on field excursions.

The excursions provide students with a better understanding of cave geomorphology and highlights specific geological features covered in the university course.

Other activities include canyoning, bushwalking and occasionally cross country skiing and white water kayaking.