At Jacobs, we're challenging today to reinvent tomorrow by solving the world's most critical problems for thriving cities, resilient environments, mission-critical outcomes, operational advancement, scientific discovery and cutting-edge manufacturing, turning abstract ideas into realities that transform the world for good. Developing design criteria, defining systems requirements, developing conceptual, preliminary and detailed design documents, completing calculations related to sizing fans, dampers, silencers and other mechanical and tunnel ventilation equipment.