This article describes students’ emotional intelligence (EI) development when participating in the Trans-Atlantic and Pacific Project (TAPP) in two technical and professional communication (TPC) courses. The researchers used modified grounded theory to compile the emotions used for coding students’ weekly reflections, and content analyzed how the TAPP experience affected students’ EI development. Overall, the article emphasizes the importance of supporting TPC students’ EI development in low-stakes environments since EI directly impacted their actions when collaborating.