Senior Proposal Writer

About this role

At OneStream, we're on a mission to empower every Finance organization and professional to exceed their potential. Our global teams span continents, cultures, and time zones, united by a shared purpose as we build the operating system for modern Finance and help organizations move with greater speed, clarity, and confidence. That mission comes to life through our people. Behind every innovation, customer success, and milestone are talented people working together to make a difference.

That's why we're looking for people who are bold enough to think big, authentic in how they lead and collaborate, curious about what's possible, and committed to delivering results. Want a closer look before you apply? Explore our Careers site to learn more about our people, culture, and benefits. Senior Proposal Writer- Open to UK, France and Netherlands The Senior Proposal Writer leads the most complex, high-stakes and non-standard RFX responses from intake to submission, as a trusted partner to Sales.

Alongside Solution Consulting and subject-matter experts, this role guides strategy shaping, pulls the contributions together and delivers proposals that are clear, accurate and give buyers confidence in the outcomes OneStream delivers. The role also coaches other writers and helps raise the standards, content and tools the whole team works with. Primary Duties and Responsibilities Lead complex, high-stakes and non-standard RFI, RFP and RFQ responses from intake to submission, maintaining the highest standards of execution and submission integrity.

Work with Sales to understand the deal behind each response (the buyer’s priorities, the competition, the evidence that builds confidence) and shape the proposal around it. Coordinate concurrent contributions from Sales, Solution Consulting, Finance, Legal, Product and other specialist teams. Set and run the project cadence (including kick-off, RFP tool setup, check-ins, reviews, packaging and close-down), creating clarity, facilitating multiple contributors and consistently meeting deadlines and milestones.

Take each response over the line, checking structure, formatting, accuracy and clarity before it goes. Knowledge & Continuous Improvement Keep knowledge of OneStream’s platform and competitive positioning current, and catch outdated or inaccurate product information before it goes out. Spot gaps and help close them, in how responses are crafted and positioned and in the standards, workflows, templates, tools and content library behind them.