Sustainability Data Specialist in City of London

The Apex Group was established in Bermuda in 2003 and is now one of the world’s largest fund administration and middle office solutions providers. Our business is unique in its ability to reach globally, service locally and provide cross-jurisdictional services. With our clients at the heart of everything we do, our hard-working team has successfully delivered on an unprecedented growth and transformation journey, and we are now represented by over circa 13,000 employees across 112 offices worldwide. Your career with us should reflect your energy and passion. That’s why, at Apex Group, we will do more than simply ‘empower’ you. We will work to supercharge your unique skills and experience. Take the lead and we’ll give you the support you need to be at the top of your game. And we offer you the freedom to be a positive disrupter and turn big ideas into bold, industry-changing realities. For our business, for clients, and for you

Sustainability Data Specialist

About Holtara

Holtara helps investors, fund managers and companies understand and improve their sustainability performance. We combine technology, high-quality sustainability data and expert advice to solve complex challenges across the private markets. At the center of our offer is Holtara.io, our sustainability data and insights platform. Clients use it to collect and validate ESG data, calculate carbon footprints, benchmark portfolios and produce decision-ready analysis.

The role

We’re looking for someone to help us reimagine how sustainability data is explored, understood and communicated. This is a hands‑on, client‑facing role in our Product team, combining analytical thinking, product development and AI‑assisted building. You’ll work directly with clients to understand their challenges, explore ideas and create solutions they can use and test. You might build an interactive report, develop a portfolio dashboard or explore new ways for clients to interrogate their data. The aim is not simply to create convincing prototypes, but to turn promising ideas into useful, reliable products, identifying where they could benefit clients more broadly. You’ll have room to experiment with emerging tools, alongside sustainability consultants, product managers and engineers who can help bring the strongest ideas into everyday use.

What you’ll do

• Understand client and user needs.
• Lead focused client conversations, look beyond requested features and turn loosely defined challenges into clear priorities.
• Bring ideas to life.
• Use AI‑assisted development and analytics tools to build interactive dashboards, visualizations and reporting experiences, testing and refining them with users.
• Take solutions beyond the prototype.
• Connect them to client data, put them into operation and establish clear documentation and ongoing ownership, with specialist support where needed.
• Make the results trustworthy.
• Investigate data quality, calculations and assumptions, and work with sustainability specialists to ensure outputs are methodologically sound.
• Keep improving.

What we’re looking for

• Minimum three years of work experience in contact with clients working hands‑on with sustainability or ESG data, for example in consultancy, data providers, financial services or software.
• Practical experience using AI‑assisted tools to create useful digital or analytical solutions, whether professionally or through your own projects.
• Strong analytical judgement and experience: you can work through complex data, question results and explain what the evidence does and doesn’t support.
• Confidence working with clients, understanding priorities and communicating ideas clearly.
• An eye for making complex data understandable and impactful.
• The resourcefulness to troubleshoot what you build, check its quality and recognise when deeper technical expertise is needed.
• A genuine personal commitment to sustainability and motivation to apply your skills in this field.
• You don’t need a particular degree, a prescribed programming stack or previous ESG employment.
• Sustainability knowledge, software development experience and familiarity with private markets are welcome; but evidence of thoughtful, hands‑on problem‑solving and demonstrable experience working with AI and complex datasets matter more.

What we offer

• Exposure to leading investment managers, asset owners and portfolio companies.
• Opportunities to attend industry events, conferences and professional development programmes.
• High levels of ownership, autonomy and influence from day one.
• Freedom to test new ideas and shape products through innovation and experimentation.
• Access to cutting‑edge AI, analytics and visualisation tools.
• Direct involvement in solving real client challenges and influencing product strategy.
• A fast‑paced environment where ideas can quickly become client‑facing solutions.

About Apex Group

We are dedicated to driving positive change in financial services while fuelling the growth and ambitions of asset managers, allocators, financial institutions, and family offices. Established in Bermuda in 2003, the Group has continually disrupted the asset serving industry through our investment in innovation and talent. Today, we set the pace in asset servicing and stand out for our unique single‑source solution and unified cross asset‑class platform which supports the entire value chain, harnesses leading innovative technology, and benefits from cross‑jurisdictional expertise delivered by a long‑standing management team and over 13,000 highly integrated professionals. We’re a people‑powered business, and our people are full of ambition. Together, we’re inspired to lead the new era of data and tech‑enabled service. Bringing new products and services to market. Sharpening our client focus. Disrupting the market to exceed expectations. Innovating across a range of specialisms. With our focus on making a difference to our people, our planet and our society, you’ll experience more here than you would at most other companies. Prepare to accelerate. We’ll make sure the time and effort you put in takes you further, faster. Positive change starts with you. We’re a people‑powered business with a vision to inspire a new era of service‑led FinTech. We’re expanding globally and offering more to our clients. This means you get more opportunities to grow with us. So prepare to accelerate. We’ll make sure the time and effort you put in takes you further, faster. The journey is yours to own. When you stretch yourself, you grow. We want you to explore ways of working that will see you thrive as part of something bigger. We’ll help you with a solid structure, challenging projects, vibrant networks, supportive colleagues and approachable leaders. All the things you need to own your unique journey.

Find out more about us

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