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Pathways to Enable Secure Open-Source Ecosystems (PESOSE) (NSF 26-506) is sponsored by National Science Foundation (NSF). This program aims to harness the power of distributed open-source development to address challenges of national, societal, and economic importance. Proposals should clearly describe a build and test infrastructure, and procedures to address quality control and security of new content.
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Pathways to Enable Secure Open-Source Ecosystems (PESOSE) | NSF - U.S. National Science Foundation Pathways to Enable Secure Open-Source Ecosystems (PESOSE) NSF's implementation of the revised 2 CFR NSF Financial Assistance awards (grants and cooperative agreements) made on or after October 1, 2024, will be subject to the applicable set of award conditions, dated October 1, 2024, available on the NSF website .
These terms and conditions are consistent with the revised guidance specified in the OMB Guidance for Federal Financial Assistance published in the Federal Register on April 22, 2024.
Important information for proposers All proposals must be submitted in accordance with the requirements specified in this funding opportunity and in the NSF Proposal & Award Policies & Procedures Guide (PAPPG) that is in effect for the relevant due date to which the proposal is being submitted. It is the responsibility of the proposer to ensure that the proposal meets these requirements.
Submitting a proposal prior to a specified deadline does not negate this requirement.
Updates to NSF Research Security Policies On July 10, 2025, NSF issued an Important Notice providing updates to the agency's research security policies, including a research security training requirement, Malign Foreign Talent Recruitment Program annual certification requirement, prohibition on Confucius institutes and an updated FFDR reporting and submission timeline.
Supports planning, building and securing sustainable open-source ecosystems that translate research tools into widely used, resilient technologies. These efforts strengthen U.S. innovation, economic competitiveness and national security. Supports planning, building and securing sustainable open-source ecosystems that translate research tools into widely used, resilient technologies.
These efforts strengthen U.S. innovation, economic competitiveness and national security. The Pathways to Enable Secure Open-Source Ecosystems (PESOSE) program supports the translation of open-source science and engineering-focused research products into safe and sustainable ecosystems that address national and societal challenges.
Open-source tools such as software, hardware, machine learning models, languages, and data platforms are designed to be shared as they are publicly-accessible and modifiable. These tools spark innovation in critical fields as varied as artificial intelligence (AI) and cloud computing, banking, healthcare, research, education, next-gen manufacturing, mobility, and National security (including cybersecurity).
PESOSE supports the creation of managing organizations for these ecosystems, ensuring strong governance, distributed development, and broad user communities across academia, industry, and government.
PESOSE also supports enhancements to the safety, security, and privacy of Open-Source Ecosystems (OSE) by addressing significant vulnerabilities, both technical and socio-technical, to improve the resistance of the ecosystem against threats.
This solicitation seeks three types of proposals, allowing teams to propose specific activities to: 1) scope and plan the establishment of an OSE, 2) establish and expand a sustainable OSE based on a robust, promising open-source product that meets an emergent societal or national need, and 3) improve the safety, security, and privacy of an existing OSE and its products.
Updates and announcements Supplemental information on PESOSE experiential activities and budget preparation The contact information below is accurate at the time of publishing. See the program page linked at the top of this solicitation for up-to-date contacts, as they may have changed. General inquiries regarding this program should be made to: PESOSE Program, telephone: (703) 292-8804, email: PESOSE@nsf.
gov Awards made through this program Browse projects funded by this program Map of recent awards made through this program Directorate for Biological Sciences (BIO) Directorate for Computer and Information Science and Engineering (CISE) Directorate for STEM Education (EDU) Directorate for Engineering (ENG) Directorate for Geosciences (GEO) Directorate for Mathematical and Physical Sciences (MPS) Directorate for Social, Behavioral and Economic Sciences (SBE) Directorate for Technology, Innovation and Partnerships (TIP)
According to the current listing, eligibility includes: See official solicitation for full eligibility details. NSF prioritizes cutting-edge discovery science and engineering research, advancing technology and innovation, and creating opportunities for all Americans. Confirm the full requirements in the official notice before applying.
Applications for Pathways to Enable Secure Open-Source Ecosystems (PESOSE) (NSF 26-506) are due September 1, 2026. Build your timeline backwards from this date to cover registrations, approvals, and final submission checks.
Pathways to Enable Secure Open-Source Ecosystems (PESOSE) (NSF 26-506) is funded by National Science Foundation (NSF). Verify program details on the funder's official page before applying.
Yes — this listing is flagged as national in scope, so applicants across the U.S. may apply, subject to the sponsor's other eligibility criteria.
Start from the official opportunity page linked in this listing — it carries the sponsor's submission instructions.
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