This dissertation in practice examines the absence of an advocacy framework for Black placemakers in southwest Springfield neighborhoods seeking to transform vacant spaces into vibrant pocket parks, green spaces, and community gardens. This critical community-based participatory research addresses inadequate public policies, resources, and technical assistance to create and sustain neighborhood sites for endurance, belonging, and resistance. Thematic findings indicated that systemic issues, street-level organizing, and sustainability are primary barriers and opportunities. An action intervention and change process was developed to establish the Springfield Park and Green Space Ecosystem (SPGE). The action plan focuses on a community coalition of power building, a community benefits agreement, zoning revisions, and public-private partnerships with results-based accountability. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]