Work with Third Sphere portfolio companies

Third Sphere
companies
Jobs

Marketing Associate

Shellworks

Shellworks

Marketing & Communications
London, UK
GBP 35k-45k / year + Equity
Posted on Jul 3, 2025
Sales · Shellworks London

Marketing Associate

Help us build a world without plastic pollution by owning customer relationships, driving growth, and shaping how we scale. Join a fast-moving team making a real environmental impact.

We usually respond within two weeks

About the Job

🎯 Marketing Associate

🌍 London, N4

🏛️ 4 days in our office, 1 day working from home

🤝 Reporting to Inés Cid Blasco, Commercial Director

💰 £35-45k per annum + equity

About Shellworks

Developed for a throwaway culture, plastics have caused significant pollution to our natural environments. 90% of all plastics ever created have never been recycled, causing widespread pollution and health impacts from chemicals and microplastics.

We believe there must be a better way and our first innovation Vivomer™ does just that, if nature made a plastic this would be it. Vivomer, a polymer made by microorganisms, behaves just like plastic in use, but degrades naturally upon disposal. It can be rigid or flexible, matte or glossy. Developed through cutting-edge material science, mechanical engineering, design, and operations, Vivomer represents a groundbreaking step towards a pollution-free future.

The nature of our work is frequently described as impossible, but if like us, you’re driven by the challenge to prove that there is a better way to do things, join us.

About the Role

This Marketing Associate role sits within Shellworks’ commercial team and works closely with our Commercial Director. You’ll collaborate across content, design, and partnerships to deliver high-impact messaging and clear, consistent communication. We’re an unusually interdisciplinary team spanning materials science, engineering, design, and business, giving you a unique opportunity to learn how great ideas move from lab to market. This is a hands-on, high-responsibility role that will accelerate your development as a marketer while directly contributing to Shellworks’ commercial success.

When you join us you’ll:

  • Shape messaging: Transform complex material science into clear, compelling content that resonates with customers, partners, and the broader market

  • Establish consistency: Launch and maintain a steady cadence of comms - newsletters, product updates, partner stories, social media, and announcements

  • Enable commercial success: Support the commercial team with impactful customer-facing assets like case studies, one-pagers, email templates, and build and optimise our engagement funnels

  • Create standout brand moments: Develop visual assets (including compost documentation and product visuals) for launches and campaigns

  • Elevate Shellworks’ presence: Contribute to our event strategy, identifying key opportunities, coordinating materials, and ensuring consistent brand execution

  • Fuel thought leadership: Engage prospective customers online and help position leadership as trusted voices in sustainable innovation

  • Systematise feedback loops: Build workflows for testimonial collection, post-engagement follow-ups, and insight-driven content planning

Our Ideal Candidate

Must-haves:

  • You have 2+ years in B2B content marketing, communications, or marketing operations

  • You have exceptional writing and storytelling skills - you make the complex feel clear

  • You bring self-starter energy and thrive in ambiguity

  • You’re excited about sustainability and working at the intersection of science and commerce

  • You’re process-oriented and detail-driven - you spot and fix gaps in systems

Nice-to-haves:

  • You have a background in journalism, brand copywriting, or creative content

  • You’ve worked with tools like HubSpot, Notion, Canva, or content workflows

  • You’ve translated technical topics for broad, non-technical audiences

What success looks like (6 months)

By month six, you’ll have:

  • Launched a repeatable content rhythm (e.g., monthly newsletter, weekly social)

  • Built a library of customer assets (case studies, launch kits, email templates) actively used by the team

  • Increased brand visibility and consistency across key external channels

  • Become a trusted partner to the commercial team, delivering on-brand content reliably and independently

Our Benefits

🌴 25 days in addition to all statutory and public holidays

📚 Opportunities for growth and development as we expand and scale our impact

🥘 Free lunch provided and access to a fully kitted out kitchen

👍 Competitive salary and equity options

🎉 Regular social events

🐚 Part of a tightly knit team aiming to make a meaningful social impact

Hiring Process

📞 Initial Chat
💭 Technical task
🗝️ Onsite

Our Values

It Can Be Done We believe anything is possible. We're action-oriented doers who jump in to proactively solve challenges.

Masters of Our Craft Driven by curiosity, we constantly expand our skills to deliver work that exceeds expectations.

Ambitious By Nature We set ambitious goals and push ourselves beyond comfort zones, taking ownership of the journey.

We're Singular We operate as one cohesive team, valuing our diversity and putting the mission above egos or silos.

Department
Sales
Locations
Shellworks London

About Shellworks

Shellworks aims to address one of the biggest challenges of our generation: plastic pollution. We raised a 6.2Mn Seed round by top-tier investors globally and shipped our first 100,000 units in 2022. We're now scaling our team to help us accelerate towards our mission.

We’re a group of critical optimists from backgrounds like design, engineering, and science. We aren’t bound by existing rules and stereotypes and are fundamental believers that there must be a better way. As an early-stage startup, you’ll play a fundamental role in shaping Shellworks’ future.

Sales · Shellworks London

Marketing Associate

Help us build a world without plastic pollution by owning customer relationships, driving growth, and shaping how we scale. Join a fast-moving team making a real environmental impact.

Already working at Shellworks?

Let’s recruit together and find your next colleague.