This book provides a comprehensive and scholarly account of how queer theories can enrich our understanding of organisational life beyond managerialist concerns with efficiency and productivity, with particular emphasis on how we might examine diversity in the sexualities of organisation. It critically reviews the potential for queer theories to challenge the heteronormativities that color organisational research and knowledge within areas such as diversity management initiatives on employment and lesbian, gay, bisexual and trans (LGBT) sexualities, workplace relationships as modes of organising, and the development of organisational intimacies and identities. At a time when managerialist perspectives, practices and ideas are colonising the study of sexualities in organisation, this book provides a timely and scholarly intervention into the contemporary vitality of queer theories for organisation studies researchers.