CBTC Signal Engineer

This Opportunity WSP is currently initiating a search for a CBTC Signal Engineer to join our Transit and Rail/Systems Engineering in our Seattle, WA Office. The CBTC Signal Engineer provides specialized technical support and oversight of both CBTC and fixed-block signaling systems for the program. This position ensures that signal designs, interlocking logic, and mixed-mode block configurations are reviewed, validated, and approved in compliance with operational principles and safety standards. The ideal candidate possesses a deep understanding of both traditional relay-based signaling and CBTC software-based interlocking logic, with hands-on experience supporting Sound Transit projects. This role serves as a vital liaison between the supplier, designer, and the agency to facilitate design acceptance, support test readiness, and ensure system safety and operational continuity throughout the migration to CBTC. Your Impact: • Provide technical review and approval of block design drawings and documentation for mixed-mode (CBTC and fixed-block) operation. • Serve as the primary liaison between the CBTC supplier, designer, and agency operations for all matters related to signal design coordination and block approval. • Review and assess interlocking logic implementation within both the relay-based fixed-block design and CBTC subsystem software, ensuring operational and safety compliance. • Review and approve test procedures related to interlocking logic, signal aspects, and control sequences to confirm compliance with authority requirements. • Evaluate software state machine logic used to implement interlocking functions in CBTC subsystems and ensure proper alignment with agency signaling principles and operational rules. • Provide assurance that signal design changes maintain interoperability, safety integrity, and system maintainability during migration from fixed-block to CBTC control. • Support interface alignment between CBTC zone controller logic, relay interlockings, and field signal equipment. • Participate in design and field review meetings with Engineering, Operations Planning, and Maintenance teams to address design, testing, and configuration issues. • Track and report on signal design deliverables, test progress, and open design comments requiring agency review or resolution. • Perform additional responsibilities as required to support the successful integration, validation, and acceptance of the CBTC and fixed-block signaling systems.