Proposal Writer Job at Mantell Associates in California

Mantell Associates is currently partnered with a leading CDMO specializing in drug product development, clinical & commercial supply, and regulatory-compliant manufacturing, who is seeking a meticulous and technically savvy Proposal Writer to join their Business Development & Commercial team.

If you have strong writing skills, an eye for detail, and a passion for connecting technical capability with client needs, this role could be a great fit.

Proposal Writer – Responsibilities

• Develop high-quality proposals, RFP / RFI responses, statements of work (SOWs), quotes, and commercial bids that clearly communicate the CDMO’s drug product capabilities, timelines, pricing, and differentiation
• Collaborate closely with cross-functional teams (Sales / BD, Project Management, Technical Development, Quality, Regulatory, Finance) to gather inputs – technical, operational, cost, compliance – and ensure proposals are accurate, compliant, and aligned with client expectations
• Maintain, refine, and manage a library of proposal templates, case studies, standard content, and company offerings to improve turnaround speed and consistency
• Review and ensure proposals meet legal, regulatory, and GMP manufacturing standards – ensuring technical content is correct, risk issues are addressed, and client deliverables are feasible
• Track proposal progress, act as liaison between internal stakeholders and clients for clarifications and follow-ups, make sure deadlines are met
• Analyze past proposal outcomes, capture lessons learned, and work to continuously improve processes, workflow, and content quality

Proposal Writer – Requirements

Mantell Associates is a specialist Pharmaceutical and Life Science headhunting firm. For more information on this opportunity, contact us at 44 (0)20 3854 7700.

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