Proposal Manager - Water​/Wastewater

ACCIONA is a global company, leading in the development of regenerative infrastructure that creates a positive impact on society. Our workforce consists of more than 65,000 professionals, present in more than 40 countries across the five continents, all contributing in our mission to design a better planet. Are you a passionate individual who wants to make a difference, promote sustainable development, and find solutions to the biggest global challenges including climate change, overpopulation, and water scarcity?

Come and join us in building the infrastructure our planet needs to achieve a sustainable future.

Acciona offers a competitive salary, relocation assistance where relocation is required and approved, 401(k) retirement plan, medical, dental, vision, life, short and long‑term disability benefits, tuition reimbursement, paid time off, and more.

The Proposal Manager – Water/Wastewater Sector is responsible for leading the development, coordination, and delivery of high-quality, compelling proposals for municipal and industrial water projects, including desalination, water treatment, pipeline, conveyance, and related infrastructure. This role serves as a central hub for strategic planning, content development, and multidisciplinary collaboration. The Proposal Manager ensures proposals are aligned with client needs, reflect our organization’s technical excellence, and demonstrate our commitment to effective solutions, partnership, innovation, sustainability and meaningful idea exchange.

• Lead end-to-end proposal development for water sector pursuits, from pre‑RFP planning through final submission.
• Facilitate strategy discussions, kick‑off meetings, and regular check‑ins to guide teams toward a unified, competitive proposal approach.
• Develop schedules, compliance matrices, responsibility assignments, and content plans to ensure all requirements are met.
• Oversee writing, editing, layout, and production of proposal materials, ensuring quality, accuracy, and brand alignment.

• Foster strong working relationships with internal teams, external partners, and subject‑matter experts to build cohesive and informed proposal content.
• Promote a collaborative, partnership‑oriented environment where open idea exchange strengthens proposal strategy and outcomes.
• Coordinate with joint‑venture partners, subcontractors, and teaming firms to integrate input and maintain alignment across all contributors.

• Translate technical information into clear, compelling narratives that highlight value, innovation, and client benefit.
• Develop win themes, differentiators, key messages, and graphics concepts to strengthen proposal positioning.
• Review and refine resumes, project descriptions, management plans, and technical approaches to ensure they reflect strategic priorities.

• Ensure all proposal elements meet the requirements of the RFP/RFQ, including forms, certifications, and mandated content.
• Track proposal performance metrics and lessons learned to continually improve processes and elevate proposal quality.
• Maintain libraries of past performance, templates, and standard content to support efficient proposal development.

• Support business development in pursuit planning, pipeline development, and client‑focused messaging.
• Assist technical teams with presentations, interview coaching, and follow‑up materials for shortlist interviews.
• Contribute to marketing and communications initiatives related to the water sector, including brochures, case studies, and thought‑leadership content.

• Bachelor’s degree in Communications, Engineering, Environmental Science, Business, Marketing, or a related field.
• 5+ years of experience in proposal development, preferably within the water, environmental, infrastructure, or engineering sectors.
• Demonstrated experience managing complex, multi‑disciplinary proposals for public agencies (e.g., municipalities, utilities, state agencies).
• Strong writing, editing, and storytelling abilities with meticulous…