Cubic Transportation Systems seeks a Principal Requirements Analyst to extract and interpret technical and commercial requirements from complex contracts. The role involves collaborating with contract managers, legal counsel, engineers, and the PMO to validate and structure requirements effectively. Utilizing IBM DOORS, the analyst will capture, organize, and trace requirements throughout the lifecycle, linking them to deliverables such as design documents, specifications, test plans, and manuals. Responsibilities include managing requirement changes, enabling cross-functional collaboration via DOORS Web Access, and tracking deliverable completion to support client acceptance and project close-out with accurate traceability matrices and compliance documentation.