This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Business Development & Proposal Manager based in the United States. We are seeking an experienced business development and proposal management professional to drive strategic growth opportunities within the transportation and infrastructure sectors. This remote leadership role supports complex, high-value pursuits across regional business lines, combining capture planning, client relationship development, and end-to-end proposal management. You will collaborate with business development leaders, capture managers, and marketing and communications teams to develop compelling strategies that strengthen client relationships and improve win rates. The role requires the ability to manage multiple priorities, coordinate multidisciplinary contributors, and translate business objectives into persuasive proposals. You will also help identify emerging opportunities, shape client engagement strategies, and ensure proposal quality from initial planning through final submission and interviews. Candidates must have experience working with transportation clients in California, with work locations available across California, Washington, and Arizona.