Partnerships Manager in London

thirdflow is looking for a Partnerships Manager to drive new business and build strategic partnerships that fuel the next stage of our growth. You will own the commercial relationship lifecycle - from identifying and qualifying prospects through to closing and expanding accounts. This is a founding commercial hire with a direct line to the founders and a clear path to commercial leadership as the agency scales.

About thirdflow

thirdflow is a fast-growing B2B media agency based in London. We help B2B companies create predictable, compounding demand through content-driven strategies that convert audience trust into business growth. Our media-first approach has helped scale some of Europe's largest B2B brands - from launching ABM pilots for the world's largest insurance broker to building communities of 13,000+ attendees across multiple conferences. We work at the intersection of strategy, content, and distribution, with a focus on what actually converts. The founding team brings deep experience in scaling B2B media and services businesses, and we are building thirdflow to be the agency that ambitious B2B companies turn to when they want marketing that drives pipeline, not vanity metrics.

Why This Role Matters

Demand for what we do is growing faster than our ability to convert it. We have a strong portfolio of client results, inbound interest, and a product that sells once decision-makers see it in action. What's missing is a dedicated commercial engine to turn that momentum into consistent, scalable revenue. This is your opportunity to build that engine from day one.

Key Responsibilities

• Own the full sales cycle from prospecting through pitch, close, and onboarding
• Build and manage a pipeline of qualified opportunities across target verticals
• Develop outbound strategies that open doors with senior marketing and commercial leaders at B2B companies
• Identify and develop partnerships with complementary platforms, technology providers, and industry communities
• Structure partnership and referral arrangements that generate mutual value
• Represent thirdflow at industry events, conferences, and in partner ecosystems
• Refine service packaging and pricing based on market feedback and competitive positioning
• Feed commercial insights back to the founding team to shape product development and go-to-market strategy
• Contribute to proposals, case studies, and pitch materials that articulate thirdflow's value

Required Qualifications

• 3+ years in B2B sales, business development, or partnerships - ideally within a media, marketing, or professional services environment
• Track record of sourcing and closing deals with senior buyers (VP/Director/C-suite)
• Strong commercial instincts - you can read a room, shape a proposal on the fly, and know when to push and when to listen
• Comfort operating in an early-stage environment without a rigid playbook or established processes
• Excellent communication skills - written and verbal - with the ability to translate complex service offerings into clear value propositions
• Familiarity with B2B marketing, demand generation, or content-led growth is a strong plus

KPIs

Success in this role will be measured by:

• New revenue closed
• Pipeline value and conversion rates
• Number of new client engagements and partnerships signed
• Client retention and expansion
• Average deal size growth over time

Ideal Candidate Profile

You're a builder, not a passenger. You're equally comfortable on a cold outreach as you are presenting to a room of marketing directors. You combine commercial sharpness with genuine curiosity about how B2B companies grow, and you build relationships that outlast any single contract. You want ownership - not a territory carved out for you - and you're motivated by the chance to shape a commercial function from scratch, not just inherit one.

Compensation

• Competitive base salary
• Commission structure tied to new business revenue
• Clear path to commercial leadership as thirdflow scales
• Hybrid working (London)

Hiring Process

• Intro call (fit and motivation)
• Commercial case discussion
• Founder interview (vision, values, ambition)
• Reference calls
• Offer

How to Apply

Send your CV and a short note on why this role interests you to careers@thirdflow.co.uk or apply directly on LinkedIn. thirdflow is an equal opportunity employer.