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Senior Corporate Sustainability Manager

Trainline United Kingdom Added on Sep 7, 2026
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This role takes the lead on operationalizing Trainline’s climate commitments by managing the day-to-day delivery of their science-based targets. You will own the implementation of the Watershed carbon data platform, ensuring high-quality emissions reporting and driving real decarbonization through deep supplier engagement. Beyond the data, you will act as a primary internal ambassador, translating complex ESG progress into engaging narratives for the wider business.

The position is pivotal because it bridges the gap between high-level net-zero strategy and technical execution within a tech-first environment. By focusing heavily on Scope 3 emissions, you will directly influence how a major European travel platform reduces its indirect footprint and sets new standards for reporting on emerging impacts like artificial intelligence. It is a chance to define best practices for a company whose core product is already a sustainable alternative to flights.

This suits someone who possesses a data-driven mindset and thrives in a fast-paced technology culture. You should be comfortable navigating GHG accounting software and influencing stakeholders to turn climate data into actionable corporate change.

Job FAQs

What are the main missions and responsibilities of this role?

The primary mission centers on owning the delivery of Trainline’s SBTi-validated emissions reduction strategy, with a heavy emphasis on tackling Scope 3 emissions. You will be responsible for the full rollout and technical management of Watershed, their GHG data platform, ensuring the business is prepared for annual reporting cycles. Beyond data management, you will lead workstreams to improve ESG ratings and support the development of disclosure frameworks. You will also take a pioneering role in developing methodologies to measure the carbon impact of new technologies like AI where industry standards are still evolving.

Key learning opportunities for this job

You will gain hands-on expertise with cutting-edge climate tech by managing the Watershed platform, which is becoming a gold standard for corporate carbon accounting. This role offers a unique chance to work at the intersection of sustainability and AI, contributing to how the tech industry measures the environmental footprint of machine learning. Additionally, you will deepen your knowledge of European disclosure requirements and ESG rating methodologies. Being part of a progressive tech company means you will learn how to apply rigid science-based targets within an agile, high-growth business environment.

How does the ideal candidate look like (experience, skills)?

The ideal candidate has a proven track record of driving corporate sustainability within tech-led or progressive organizations. You must have deep experience with science-based target reduction plans and feel confident using GHG accounting software to manage complex data sets. Soft skills are just as vital; you should be a persuasive communicator capable of influencing supplier relationships and presenting progress to senior leadership. A background in leading organizational change or transformation initiatives will help you stand out.

Advice to stand out and make a successful application

Focus your application on your technical proficiency with carbon data tools and your ability to influence non-sustainability teams. Trainline values 'Ownership,' so provide specific examples of where you took a climate target from a strategy document to a measurable result. Show your alignment with their 'Think Big' value by discussing your thoughts on emerging sustainability challenges, such as the energy demands of AI. Demonstrating that you understand the nuances of Scope 3 in a digital service context will make your profile much more competitive.

What aspects of the company's sustainability is this role likely to focus on?

The role is heavily weighted toward climate action and decarbonization, specifically reaching the 2040 net-zero target. A major portion of your work will involve supply chain engagement, as reducing indirect emissions is the most significant lever for a technology platform. You will also focus on governance and transparency by ensuring data integrity for ESG disclosures. The role ensures that sustainability is not just a marketing claim but is technically embedded into the company’s operational and financial reporting structures.

What are the main challenges someone in this role might face?

One of the main challenges will be engaging diverse suppliers to align with Trainline's net-zero ambitions, which requires navigating different levels of climate maturity across partners. You may also face the difficulty of standardizing data in areas where methodologies are still being built, such as digital infrastructure emissions. Balancing long-term climate goals with the rapid, short-term delivery cycles typical of a tech company can be a point of friction. You will need to maintain momentum on multi-year targets while delivering immediate reporting accuracy.

How could a typical day look like for someone in this position?

A typical day might involve a morning deep-dive into Watershed to audit emissions data, followed by a meeting with the procurement team to discuss supplier engagement strategies. You could spend the afternoon drafting a briefing for the Company Secretary on emerging ESG disclosure requirements. Interspersed with technical work, you will likely facilitate internal workshops to educate colleagues on sustainability progress. The role is highly collaborative, meaning you will move constantly between data analysis and stakeholder advocacy.

What are the opportunities for professional growth and development in this role?

This role offers high visibility, reporting closely to the Director of Sustainability and interacting with senior stakeholders. Success in this position could lead to a broader leadership role within the ESG function or a strategic position overseeing sustainable business transformation. As the company expands its European footprint, there are opportunities to lead cross-border sustainability projects. You will also build a reputation as an expert in tech-sector decarbonization, a highly sought-after specialization in the current job market.

The main stakeholders you might be interacting with

You will work most closely with the Director of Sustainability and the Company Secretary to align on corporate strategy. On a day-to-day basis, you will interact with procurement and data owners who manage the supplier relationships essential for Scope 3 tracking. External stakeholders include ESG rating agencies, sustainability software partners, and supply chain partners. You will also act as a bridge to the broader employee base, serving as a corporate ambassador to ensure sustainability remains a core part of the company culture.

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