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Energy storage is the most exciting area in energy today. Massive amounts of energy storage are required if renewable energy is to take its rightful place on the electric grid. Invinity provides an alternative to the most common type of battery, lithium‑ion because the battery technology that works so well in our pockets doesn’t work as well at the grid scale; it wears out, limits use, and even catches fire.

Manufactured as a standardised product in a factory, Invinity’s vanadium flow batteries don’t degrade, won’t catch fire, and can be operated continuously from full charge to full discharge for 25 years. Invinity has 75 megawatt‑hours of its modular battery systems in 82 projects across 15 countries – more than any other company in the space. We’ve deployed the largest flow battery systems in the U.S., Canada, Australia, and the U.K., and are supported by the UK’s National Wealth Fund, some of the world’s leading institutional investors and our projects are backed by major institutions including the U.S. Department of Energy and the U.K. Government.

A compelling product and recent funding put Invinity in a position to grow dramatically as it addresses the global imperative for stationary energy storage. Join us as we help transform renewable energy into a stable and dependable contributor to the transition to net zero.

Invinity has operations in the U.K., Canada and the U.S. and trades publicly in the U.K. on AIM and AQSE and in the U.S. on OTCQX. For more information about us visit our webpage.

Location: Central Belt, Scotland (Hybrid)

Department: Supply Chain / Procurement

Contract: Full‑time, Permanent

Salary: Competitive, with benefits

Reports to: Head of Supply Chain / Procurement Manager

We are looking for an experienced and commercially‑minded Senior Buyer to join our Supply Chain team. This role is central to ensuring continuity of supply for our global manufacturing operations, supporting improved cost performance, supplier quality and strategic sourcing decisions across an international supply base.

This is an opportunity for a strong procurement professional to shape our supplier strategies, drive high‑impact improvements, and work closely with engineering, operations, planning and quality teams in a fast‑paced manufacturing environment.

• Manage and develop a global supplier base across multiple regions (U.K., E.U., Asia, North America).
• Conduct strategic sourcing activities, including supplier research, RFQs, tendering and total cost analysis.
• Lead commercial negotiations to secure best value, quality and delivery performance.
• Identify and onboard new suppliers in line with business growth and risk mitigation strategies.
• Deploy supplier performance scorecards and drive continuous improvement with key vendors.

• Oversee purchase order placement, expediting and delivery management for critical components.
• Support NPI and engineering change processes, ensuring material readiness and smooth introduction to manufacturing.
• Work with planning and production teams to maintain inventory targets, optimise MOQ and reduce lead times.
• Resolve supply disruptions and elevate risks proactively.

• Analyse market trends, commodity price movements and global supply chain risks.
• Support annual cost‑down initiatives and budget cycles.
• Maintain accurate data within ERP systems (e.g., Business Central, SAP, Oracle, Dynamics).
• Produce procurement reports, forecasts and risk assessments for senior leadership.

• Partner with Quality, Engineering and Operations to ensure supplier compliance with specifications, audits and corrective actions.
• Support sustainability, ESG and ethical sourcing initiatives.
• Represent procurement in project teams and continuous improvement activities (Lean, Six Sigma or similar).

• Significant experience as a Buyer / Senior Buyer in a manufacturing, engineering or technical environment.
• Experience managing global supply chains, preferably with high‑value or complex components.
• Strong negotiation skills with a proven record of delivering cost, quality and delivery improvements.
• Proficiency in modern ERP systems (Microsoft Business Central, SAP, Oracle, IFS, Dynamics).
• Ability to read engineering drawings and understand technical specifications.
• Excellent analytical skills with strong Excel capability.
• Experience managing supplier risk, contracts and service‑level agreements.

• CIPS Level 4 or above.
• Experience working in renewables, energy storage, automotive, aerospace, electronics or heavy engineering.
• Knowledge of international logistics and trade compliance.
• Exposure to Lean manufacturing or continuous improvement principles.
• Chinese Language would be a huge plus but not essential.

• Strong communicator with the confidence to challenge and influence at all levels – a bit of savvy in negotiations, this is not a Junior role.
• Emotional intelligence and someone who can progress problems into solutions.
• Highly organised with the ability to manage competing priorities in a deadline‑driven environment.
• Commercially astute with a mindset for continuous improvement (LEAN).
• Comfortable working independently while also contributing to a collaborative team environment.
• This role may involve travel potentially Canada & Asia as well as Europe.
• We are a small but scaling organisation – happy to adapt but also we do need people to jump into help our other teams and be willing to flex.
• Willing to mentor.

• Invinity Employee Benefits (U.K.)
• Competitive pay reviewed annually based on individual and company performance.
• 25 days’ annual leave plus 8 public holidays (33 total), with up to 5 days carry‑over each year. (We take leave for the Festive Shut Down)
• Early finish every Friday at 1:30pm to support work‑life balance for our Assembly Teams.
• Flexible and hybrid working options for non‑assembly teams.
• Private Medical Insurance and Medicash after probation, including 24/7 wellbeing and counselling support.
• Group Income Protection and Life Assurance providing financial peace of mind.
• Pension scheme with up to 5% employer matching if you choose it.
• Cycle‑to‑Work promoting sustainable travel.

Invinity Energy Systems is an equal opportunities employer, committed to creating a workplace where everyone is treated fairly, with dignity and respect. We fully comply with the Equality Act 2010, ensuring that no applicant or employee receives less favourable treatment on the grounds of gender, sex, gender identity or expression, marital or civil partnership status, pregnancy or maternity, race, colour, nationality, ethnic or national origin, religion or belief, disability, sexual orientation, or age.

At Invinity, we are actively focused on increasing the representation of women across all levels of our organisation, particularly within our engineering, manufacturing and technical teams. We believe that diverse perspectives drive better innovation, and we are committed to providing a working environment where women can thrive, lead, and progress their careers in STEM.

Our culture is one of respect, inclusion, and empowerment — where every individual can contribute fully and confidently to a sustainable energy future.