Reply To: HHS/NIH SBIR Land Home › SBIR Land Forums › Institute & Agency Questions › HHS/NIH › Reply To: HHS/NIH at 11:09 pm #688 Lu@EGCModerator Up0Down:: Hua, consultants provide letters to show their commitments to the project. They are usually giving guidance and advice and usually do not perform the work. Each PD/PI must have a PD/PI role and a leadership plan is required.