Marketing Scientist

Blenheim Chalcot; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Workplace pension (Royal London)

£1,000/year flexible benefits

Wellhub membership

25 days' annual leave + 8 bank hols +

Life assurance 4x salary

Cycle to Work

Salary Finance loans

Volunteer days

Lunch & Learn events

Office culture with Blenheim Chalcot

Job summary

Fospha is the measurement system for enterprise retail and ecommerce brands. We help marketing teams view performance daily across channels, from websites to Amazon and TikTok Shop, with decision-making grounded in data.

We are seeking a Marketing Science expert to act as the technical authority for our Enterprise tier, coordinating with Customers, Customer Teams, Data Science, and Product. This role focuses on operationalizing advanced modelling into client-driven business outcomes within the

Qualifications

• 3-5 years of experience in marketing science, data analytics, or technical account management.
• Deep understanding of MMM, MTA, incrementality testing, and the AdTech ecosystem (Meta, Google, TikTok).
• ,

Responsibilities

• Client-Facing Support: Proactively support Customer Success and Account Management teams on model trust and methodology escalations.
• Incrementality & Learning Agendas: Design first-party incrementality tests and learning agendas for clients.
• R&D "Mouthpiece": Capture field feedback and objections, feeding structured intelligence back to Product and Data Science teams.
• Collateral & Knowledge Creation: Build technical collateral, Academy content, and internal training to raise data literacy.

Skills

Marketing science

Media Mix Modeling

Multi-Touch Attribution

Bayesian modeling

Cross-functional collaboration

Communication skills

MMM

Google

Meta

TikTok

Tools

Meta

Google

TikTok

Job description

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

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We're office-first because our tight-knit hub culture thrives on in-person collaboration: 5 days/week in-office during probation, then 4 in-office / 1 remote.