Recently, career counselors were encouraged to help clients make career choices that are both environmentally and socially sustainable. However, to date, the career difficulties associated with such “green guidance” process have not been delineated. Based on career development obstacles identified in the scientific literature, this article proposes a non-exhaustive typology of issues specific to the consideration of ecological and human factors during career counseling. For each category of difficulty, examples are provided, and practical avenues are suggested. The contributions and limitations of this exercise are discussed, especially with regards to the clarification of the particular role of career counselors in promoting sustainability.