The purpose of this study is to analyze the effect of high involvement HR practices on idiosyncratic deals namely; Flexibility and Task deals. The research relied on the analysis of previous literature studies to pose the research hypotheses. Questionnaires were developed using sound and reliable measures whereby a number of 384 questionnaires were distributed among the consulting organizations in Cairo, Giza, and Alexandria zones. A Statistical analysis was conducted whereby appropriate tests were run to analyze the gathered data. Common method bias was considered. Results revealed that high involvement HR practices have a positive effect on flexibility and task idiosyncratic alongside with differences in the effect among both types of idiosyncratic deals. This research contributes to the existing literature findings exploring a contemporary construct, idiosyncratic deals, as well as exploring a significant service-oriented domain, and consulting organizations.