NSF Mid-Career Advancement Program MCA
21-516
Grants.gov  https://www.grants.gov/web/grants/view-opportunity.html?oppId=329504
MCA Overview:  https://www.nsf.gov/bio/MCA_Overview.jsp 

The Mid-Career Advancement Program is the only cross-directorate NSF program specifically aimed at providing protected time and resources to established scientists and engineers targeted at the mid-career (Associate Professor rank or equivalent) stage. Participating programs in the Directorates for Biological Sciences (BIO), Geosciences (GEO), Engineering (ENG), Social, Behavioral and Economic Sciences (SBE), and Education and Human Resources (EHR) will accept MCA proposals. PIs are encouraged to discuss the suitability of their MCA proposal with a program officer from the appropriate directorate: see  https://www.nsf.gov/bio/MCA_contacts.jsp