Before attending Harvard, Wolfensohn was a lawyer in the Australian law firm of Allen, Allen & Hemsley in Sydney (now Allens Arthur Robinson). Upon graduating from Harvard Business School, Wolfensohn worked briefly for Swiss cement giant Holderbank (now Holcim). He also worked for an air-conditioner company requiring him to travel across India, Nigeria, Greece, Mexico, Latin America, and other developing countries. He wrote in his memoir about the poverty and inequity, "The inequity was so striking that I could hardly absorb what was in front of me. I had known what to expect intellectually, but, the reality was a shock. It left an indelible mark that would influence my later life."