This U.S. Environmental Protection Agency (EPA) technical publication is intended for environmental practitioners engaged in the investigation, design, remediation, and closure or reuse of contaminated sites. It may be of particular interest to project managers, senior technical advisors, stakeholders and others who are responsible for project planning, management and technical execution; as well as non-technical individuals engaged in project participation. This technology bulletin explains how systematic project planning (SPP), a comprehensive planning process for environmental cleanup projects, can be used to plan and execute projects more effectively to achieve the often diverse strategic objectives of all stakeholders, while satisfying the specific technical and quality objectives required for each stage of a project's life cycle. Derived as a best management practice (BMP) under the Triad Approach to Site Assessment and Cleanup, SPP has been successfully implemented in each of the primary regulatory frameworks, including Brownfields, Superfund, Resource Conservation and Recovery Act (RCRA), underground storage tanks (UST), and numerous states voluntary cleanup programs. It has also been used in integrated regulatory program frameworks.