Purpose – The purpose of this paper is explore an organizational design that allows firms to invest in transferable strategic human capital. Strategic human capital requires considerable investment in training costs, effective compensation, opportunities for professional development and expectancy of long employment relationship within a firm. A firm can undertake investment in strategic knowledge and workers can engage in learning only in these circumstances. However, there are a number of risks that are associated with investment in strategic human capital within a firm […]. Design/methodology/approach – This paper conceptualizes the use of alliance based on co-specialization as a strategy to optimize investment in strategic human capital resource […]. Findings – First, the paper reviews the theoretical literature on human capital as a strategic resource (Becker, 1962; Coff, 1997), its sourcing on internal and external labor markets and respective employment systems (Delery and Doty, 1996; Doeringer and Piore, 1971). Second, it focuses on the features of human capital resource (Barney, 1986; Chi, 1994; Doz and Hamel, 1998). Third, it conceptualizes the use of alliances based on co-specialization as organizational structures for investment in human capital across organizations and examines respective employment system and HR practices (Delery and Doty, 1996; Doeringer and Piore, 1971) […]. Originality/value – This paper discusses collaborative ventures as a sourcing strategy of the human capital. An alliance strategy is relevant for sourcing the strategic human capital resources […].