Fospha is the measurement system enterprise retail and ecommerce brands run their business on. We give marketing teams one clear, daily view of what's actually working - across every channel and everywhere they sell, from their website to Amazon and TikTok Shop - down to the level of a single ad or piece of creative. It replaces guesswork and gut feel with a number marketing, finance and agencies can all trust and act on.
Brands including Dyson, Gymshark, Adanola and Huel use Fospha up to 25 times a day to decide where budget should move next. We've spent over a decade building this, with more than $40 billion in marketing spend now optimised through the platform - and we're scaling fast across London, Mumbai and Austin.
The Role:
Fospha is pioneering the future of marketing intelligence, moving enterprise retailers beyond the broken world of click-based attribution. Our mission is to transform complex data into the single, most trusted source of truth for CMOs and CFOs managing high-stakes budgets.
As a Marketing Science, your focus will be acting as the technical authority for our Enterprise tier, serving as a dedicated conduit between our Customers, Customer Teams, Data Science, and Product teams.
We are looking for a rigorous, analytical practitioner ready to operationalize advanced modelling into tangible business decisions, driving sustainable growth for clients like Huel, Dyson, and Gymshark. You will operate as a post-sales, value-delivery engine embedded directly within the Customer Success department.
Key Responsibilities
- Client-Facing Support: Proactively and reactively support Customer Success and Account Management teams on model trust and methodology escalations, directly combating objections related to competitors like Triple Whale or Northbeam.
- Incrementality & Learning Agendas: Act as the primary Marketing Science Strategist, designing first-party incrementality tests, calibrating models, and building structured learning agendas for clients.
- R&D "Mouthpiece": Systematically capture and triage field feedback and methodological objections, feeding structured intelligence back to our Product and Data Science teams.
- Collateral & Knowledge Creation: Build the definitive technical collateral, Academy content, and internal training to raise the baseline data literacy of our entire Go-To-Market organization.
What are we looking for? We hire for potential - you should apply if you:
- Marketing Science Experience: 3-5 years of experience in marketing science, data analytics, or technical account management.
- Measurement & AdTech Knowledge: Deep understanding of Media Mix Modeling (MMM), Multi-Touch Attribution (MTA), incrementality testing, and the broader AdTech ecosystem, including Meta, Google, and TikTok.
- Commercial Translation: The rare ability to translate complex data science and Bayesian models into highly digestible commercial insights for non-technical executives.
- Communication Skills: Excellent verbal and written communication skills. Ability to articulate complex concepts clearly and persuasively to diverse audiences. Proven track record of working effectively in cross-functional teams. Ability to build consensus and drive alignment across diverse stakeholders.
- Problem-Solving Skills: Strong problem-solving abilities with a proactive approach to identifying and addressing challenges. Ability to navigate ambiguity and make sound decisions under pressure.
What We Offer:
- A workplace pension, through Royal London, with Fospha matching your contributions up to 3%
- A £1,000/year flexible benefits allowance to put towards private medical insurance, dental cover, a health cash plan, gym membership, extra holiday, or a pension top-up - whatever suits you!
- Access to Wellhub, giving you one membership across gyms, boutique studios, and wellbeing apps
- 25 days' annual leave plus 8 UK bank holidays, an extra day off for your birthday! and more holiday the longer you stay (26 days after 3 years, 27 after 6)
- Life assurance worth 4x your annual salary, from day one
- Cycle to Work scheme, plus discounts on everyday spending through our benefits portal — Apple, Tesco, IKEA, M&S, Deliveroo, cinema tickets and more
- Quarterly one-to-one sessions with a financial adviser, plus access to payroll-deducted loans through Salary Finance
- Paid volunteering days each year
- Regular socials, free weekly snacks, and Lunch & Learn events at our Scale Space office, plus access to the wider Blenheim Chalcot community
- Opportunities to travel — including to our India and North America offices
Our Values and Principles You will be able to demonstrate examples of our core principles:
- Seek inclusion & diversity: We create an environment where everyone feels welcome, and people are encouraged to speak and be heard
- Work Hard, Work Well, Work Together: We take responsibility for making things happen, independently and together; we help colleagues in need and close loops, making sure our work is complete and has lasting impact
- Grow: We are proactive, curious and unafraid of failure
- Customer at the heart: We care about the customer, feel their pain and love building product that solves their biggest problems
- Candour with caring: We deliver candid feedback with kindness and receive it with gratitude
By submitting your CV you understand that we have a legitimate interest to use your personal data for the purposes of assessing your eligibility for this role. This means that we may use your personal data to contact you to discuss your CV or arrange an interview, or transfer your CV to the hiring manager(s) of the role you have applied for. You can ask us at any time to remove your CV from our database by emailing [email protected] – but please note that this means we will no longer consider you for the role you have applied for. You can review our privacy policy here.
Skills Required
- 3-5 years of experience in marketing science, data analytics, or technical account management
- Deep understanding of Media Mix Modeling, Multi-Touch Attribution, incrementality testing, and the broader AdTech ecosystem
- Knowledge of Meta, Google, and TikTok advertising platforms
- Ability to translate complex data science and Bayesian models into commercial insights for non-technical executives
- Excellent verbal and written communication skills
- Experience working effectively in cross-functional teams and building stakeholder consensus
- Strong problem-solving skills and ability to navigate ambiguity and make sound decisions under pressure
What We Do
We are venture builders, not venture capitalists. We invest more than just funds; we invest our knowledge and experience, our ideas and our infrastructure. Our approach to transforming industries has always been the same. We identify high growth sectors, typically undergoing some market, technology or regulatory discontinuity, and look to build scalable platforms that satisfy a real customer need. We aim to build profitable companies, with sustainable business models. Working alongside entrepreneurs and co-founders, we support our ventures from startup to scale to exit, giving them access to the global networks and business development services they need to grow. This support is bolstered by the innovation partnerships we forge with big businesses. Our digital expertise helps them be more agile, while their global scope helps our ventures scale faster. Founded in 1998 Blenheim Chalcot traces its roots back to Netdecisions, the internet services group. Already back then we set out to build companies to transform industry sectors. And since then we’ve become the UK’s leading venture builder, with portfolio sales of over £350m, more than 3,000 employees, and a successful track record of over 40 companies. We operate internationally with offices in: - London, UK (HQ) - Mumbai, India - Tampa, USA - Cape Town, South Africa
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