Leishmania species parasite infections, termed the leishmaniases, cause significant global infectious disease burden. The lifecycle of the parasite embodies three main stages that require precise coordination of gene regulation to survive drastic environmental shifts transitioning from sandfly to mammalian hosts. Constitutive transcription in these kinetoplastid parasites is overwhelmingly reliant on post-transcriptional mechanisms, yet strikingly few Leishmania trans-regulator proteins are known. Utilizing optimised crosslinking and in-depth, quantified mass spectrometry, we present a comprehensive analysis of over 1,400 mRNA binding proteins (mRBPs) and whole cell proteomes from the three main lifecycle stages.