This paper covers the process that developed the contracts for the MOD Sandbox pilot projects in the Los Angeles and Puget Sound regions. It discusses the nuances of interactions between private companies and public agencies, including non-disclosure agreements, data sharing, and the challenges and opportunities faced between the transit agencies and the MOD provider as well as between the other entities involved in the service provision and evaluation of the project. It compares and contrasts how contracts developed between transit agencies, private sector providers, and researchers. It concludes with recommendations for how the contracting process can be improved to ensure better project outcomes.