As the Senior Proposal Writer, you will support large, complex, proposal development activities, interpret solicitation and statement of work/performance and work statement requirements, create proposal responses based on input from solution developers, capture managers, and technical subject matter experts. Our client is a federal government organization, that is tribally owned, and leads a diverse group of contracting companies, focused on building solutions, solving complex challenges, and serving their mission, around the globe for more than 60 federal clients.