NIOSH Investigator-Initiated Research Grants

NIOSH Exploratory/Developmental OSH Grant

Supports exploratory and developmental grants for novel approaches in occupational safety and health research.

The NIOSH Exploratory/Developmental OSH Grant, funded through the R21 mechanism under program announcement PAR-18-798, supports novel and higher-risk research approaches in occupational safety and health. NIOSH — the National Institute for Occupational Safety and Health, an institute within CDC/HHS, established by the Occupational Safety and Health Act of 1970 — administers this grant through the NIH ASSIST system, with applications reviewed by NIOSH/CDC Scientific Evaluation Panels rather than standard NIH study sections. The R21 mechanism is intended for conceptually innovative projects that explore new directions, test feasibility of new methodologies, or examine emerging occupational health questions that cannot yet justify the full scope of an R01 application. Award amounts are capped at $275,000 in direct costs over a maximum two-year project period, per the NIH R21 standard mechanism.

The program accepts applications on three standard NIH submission cycles per year, with due dates falling approximately in February, June, and October. Eligible applicants include domestic universities, research organizations, nonprofits, for-profit organizations, and individual investigators with institutional affiliation, provided they hold a registered eRA Commons account. All projects must address occupational safety and health research within NIOSH's defined mission scope. NIOSH periodically reissues the PAR announcement with updated numbers; applicants should confirm the current active identifier on the NIH Guide before submitting. Note that the WTC Health Program issues a separate, distinct R21 announcement (RFA-OH-26-015) restricted to World Trade Center-related health conditions — that program is cataloged separately.

The R21 mechanism is appropriate for investigators with a preliminary concept but insufficient pilot data for a competitive R01. Because the mechanism supports exploratory work, applications are evaluated on scientific premise, innovation, and potential impact rather than requiring extensive preliminary findings. Stronger success rates favor applicants who clearly articulate why the proposed approach is novel relative to existing OSH research and who demonstrate methodological feasibility within the two-year and $275,000 budget constraints.