Job Specifications
Founder’s Associate
Location: London, Victoria
Type: Full-time, in office
About Thirdflow
Thirdflow is a fast-growing B2B media agency focused on one thing: helping B2B companies create predictable, compounding demand.
Founded by operators who have founded and scaled multiple successful ventures in B2B media, Thirdflow partners with ambitious companies that want marketing to be their growth engine.
We design and run content-led demand generation systems that are built to drive pipeline and revenue, not vanity metrics. Our work sits at the intersection of strategy, content, and distribution, with a strong focus on what actually converts.
Alongside our agency work, we also build and operate our own B2B media brands, including content platforms and live events focused on fast-growing niches. These media properties give us first-hand insight into what actually drives attention, trust, and demand, and they inform how we work with clients day to day. Over the next few months, we plan to launch additional media brands and events across multiple B2B sectors.
Our Culture
We are builders and entrepreneurs.
That means moving fast, experimenting, and learning by doing. We value strong execution, clear thinking, and people who take ownership of their work.
We are still shaping our playbook. You will be joining a lean team where responsibility comes early and you will be expected to get stuck in from day one.
This is not a role for someone looking for a slow ramp-up or a narrow job description. It suits someone who wants to learn quickly by doing real work with real responsibility.
The Role
We are hiring a Founder’s Associate to support the execution and delivery of marketing programmes for Thirdflow and our clients.
This is a hands-on role focused on doing the work. You will be in the trenches, helping to execute content and demand generation campaigns, supporting client delivery, and learning how a B2B marketing agency and media business is built from the inside.
You will work closely with the founders and senior team, with direct exposure to how we think about strategy, delivery, and growth.
What You Will Do
Support the execution of content-led demand generation programmes for clients
Help produce and manage content across formats including articles, reports, social posts, newsletters, podcasts, and video
Assist with campaign setup and execution across channels such as email, organic, paid, and partnerships
Track performance metrics and help report on results
Support day-to-day client delivery and communication
Help document processes and improve how we deliver work
Support the founders and senior team on ad hoc projects as the business grows
What Success Looks Like in the First 6 Months
You are reliably executing marketing tasks to a high standard
You understand how our content and demand programmes work end to end
You can manage your workload independently and hit deadlines consistently
Clients and the team trust you to deliver what you are responsible for
You are developing strong fundamentals in B2B marketing and delivery
Who This Role Is For
This role is suited to someone who:
Has 1–2 years’ experience in marketing, content, demand generation, or a related role
Has worked in a high growth marketing agency startup, VC or consultancy environment
Has a genuine interest in B2B marketing and how companies generate demand
Is comfortable doing hands-on work and learning by execution
Is organised, reliable, and takes pride in delivering good work
Is adaptable and comfortable working in a fast-moving, early-stage business
Wants to learn directly from founders and experienced operators
Is ambitious and wants to grow into a more senior role over time
Why Join Thirdflow
Direct exposure to how a B2B agency and media business is built
Responsibility and real work from day one
The chance to learn fast by working closely with founders and senior operators
Clear progression into more senior roles as the business grows
Opportunity to work with high-growth media brands and ambitious B2B companies
Competitive salary, performance-based bonuses, and learning support
How to Apply
Please submit your application, including a detailed resume, references, portfolio, and a cover letter explaining why you're the ideal candidate to drive our company success forward.
Applications should be sent to careers@thirdflow.co.uk or directly on Linkedin.
Thirdflow is an equal opportunity employer. We value diverse perspectives and are committed to building an inclusive, high-performing team.
About the Company
Our media-first approach helps B2B companies capture attention, build trust, and generate high-quality leads that convert consistently. We've helped scale some of Europe's largest B2B brands by focusing on what matters: creating content people actually want, delivering it where they already are, and building relationships that translate directly to business growth.
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