Yossi is the Australian Workers' Union national Occupational Health and Safety Officer. Previously he was the Australian Council of Trade Unions' Occupational health and Safety Unit's Research Officer and its director for three years. He holds a PhD in psychology from Latrobe University, Melbourne, and a BSc (Hons) from Monash University. His PhD was awarded for research in the maritime industry (occupational stressors and shiftwork in marine pilots). 

Yossi is a dual career person. He spent twelve years in the food industry, both within a large retail organisation, training as an executive, and in his own businesses. He has published extensively in the OHS field and edits a national AWU magazine, Say Safety. He lives in Victoria's Macedon Ranges.