Sr. Proposal Manager London, UK

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying.

Our mission is to empower creators to own their growth. As we scale, the RFP process is becoming an increasingly strategic part of how we compete and win with some of our most sophisticated customers. We're looking for a high-performing Proposal Manager to lead the charge in building and scaling our RFP response function. This is a high-leverage, high-impact individual contributor role with significant visibility and influence across the go-to-market organization.

You’ll be the first dedicated hire focused on RFP excellence—meaning you’ll play a critical role in shaping the systems, processes, and strategy behind how we respond to customer questionnaires. You won’t be building from scratch- we already have RFP software and practices in place- but you will have the opportunity to define best practices, elevate our approach, evolve our systems, and generally raise the bar for how Klaviyo shows up in competitive sales cycles.

You’ll find strong support and eager partners across Sales, Presales, Marketing and other parts of the business. This is a chance for someone with the right experience to shape the future of the proposal management function at a world‑class SaaS company - while also directly impacting revenue, win rate, and brand perception.

This role is in the Presales organization, which also includes Presales Solution Architects and our Demo Experience team. If you're someone who thrives on crafting compelling narratives, managing complex cross‑functional projects, and influencing strategic sales outcomes through precision and clarity—this role could be for you.

• Serve as a trusted partner and internal champion for all things RFP—becoming the go‑to expert for proposal strategy and execution.
• Own the end‑to‑end RFP, RFI, and security questionnaire response strategy and process from intake to submission, including:

• Defining what it means to qualify an RFP/RFI, balancing factors like effort, quality and ROI
• Drafting and refining initial answers to technical, functional, and business questions in RFPs and RFIs
• Sourcing and validating inputs from subject‑matter experts across the company (e.g. Sales, Product, Legal, Security, Product Marketing)
• Packaging and delivering proposals in a compelling, differentiated way that helps us win

• Ensuring all content is accurate, consistent and on‑brand
• Reviewing new content and adding to the knowledge base as appropriate

• Ensuring an effective qualification process and healthy RFP response rate
• Tracking and improving RFP win rates and turnaround times

• You have 5+ years of experience managing RFPs or proposals in a high‑growth SaaS environment, preferably supporting enterprise or mid‑market sales teams.
• You’re an exceptional project manager—organized, detail‑oriented, and comfortable juggling multiple complex deliverables under tight timelines.
• You have excellent writing, editing, and communication skills, with a strong instinct for tailoring content to different audiences.
• You’re collaborative and low‑ego—you know how to bring people together to get things done and aren’t afraid to chase down answers or ask for help.
• You’re systems‑minded and always looking for ways to improve the process—whether that’s introducing a new tool, optimizing workflows, or creating better documentation.
• You understand the nuances of enterprise buying processes and what it takes to compete in a crowded market.
• You’re excited by the idea of joining a company where your work will be visible, valued, and essential to how we win.

This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.

Klaviyo is committed to a policy of equal opportunity and non‑discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.