By Gemma Jiang, Jenny Grabmeier, Diane Boghrat and Susan Simkins.

2. Jenny Grabmeier (biography)
3. Diane Boghrat (biography)
4. Susan Simkins (biography)
What does boundary spanning in cross-disciplinary science teams entail, and how does it relate to leadership?
At its core, boundary spanning is about bridging differences. These differences usually fall into two categories:
- Interdisciplinary differences, which involve varying perspectives across different disciplines, such as vocabulary, methods, epistemologies, and cultures.
- Transdisciplinary differences, which involve perspectives from science, society, policy, and practice that transcend institutional and sectoral boundaries.
The expertise required to bridge these differences is often referred to as “integration expertise” (Hoffman et al., 2024) or as one of us (Simkins) refers to it “interdisciplinary translation.” For simplicity, we’ll refer to all these forms of expertise as “boundary spanning,” and those who play these roles as “boundary spanners.”