Senior Key Account Manager

Senior Key Account Manager – MSS Water Ltd / RSK Group, Cardiff, UK

The MSS Group is a specialist provider of facilities, industrial and environmental services with expertise in hazardous, highly regulated and complex environments.
MSS Water Ltd and RSK Group have an exciting new position for a Senior Key Account Manager based in Cardiff, UK. This is a full‑time, permanent position.

The Senior Key Account Manager will play a crucial role in leading and developing allocated key accounts, ensuring strong client relationships and strategic growth within the domestic water hygiene sector. They will act as a mentor and support network for Key Account Managers, guiding them in effective account management, operational excellence, and client development. In addition to overseeing key accounts, the role will take overall responsibility for driving sales growth, supporting Key Account Managers in expanding business opportunities with both new and existing clients.

This individual will proactively identify opportunities to enhance service offerings, maximize revenue, and contribute to the company’s long‑term success. The Senior Key Account Manager will also chair and lead both sales meetings and operational meetings, ensuring clear communication, strategic direction, and alignment with company objectives.

• Mentor and support Key Account Managers, ensuring their professional development and effectiveness in managing key accounts.
• Lead strategic account management, ensuring the fulfilment of contractual obligations while exceeding client expectations.
• Oversee the profitability and financial health of key accounts, managing budgets and ensuring targets are met.
• Drive additional sales growth by working closely with Key Account Managers to identify and secure new business opportunities within existing and potential client bases.
• Develop and implement strategic initiatives to strengthen relationships, improve service delivery, and expand the company’s market presence.
• Actively participate in client meetings and business development discussions, ensuring alignment with company objectives.
• Assist in coordinating and facilitating internal and external audits, ensuring compliance with Legionella Control Association standards and industry regulations.
• Provide leadership in operational planning and scheduling, ensuring efficiency and high‑quality service delivery.
• Chair and lead sales meetings and operational meetings, driving discussions, setting clear objectives, and ensuring follow‑through on action points.
• Collaborate with the Business Unit Lead to maintain smooth operations, structured communication, and a high‑performance culture.
• Regularly assess and report on operational performance and sales activities, identifying opportunities for continuous improvement.
• Manage and oversee on‑site teams, ensuring compliance with health and safety regulations.
• Work closely with the SHEQ team to ensure staff training, competency management, and adherence to best practices.
• Ensure the comprehensive recording of all incidents and accidents, following company procedures.
• Participate in operations meetings, contributing strategic insights to drive business growth and performance.

• Extensive experience in water hygiene account management, with a strong understanding of industry regulations and best practices.
• Proven ability to lead, mentor, and develop account management teams.
• Strong track record in driving sales growth and identifying new business opportunities.
• Excellent client relationship management skills with the ability to negotiate and influence at all levels.
• Financial acumen, including budget management and P&L oversight.
• Experience in assisting with internal and external audits related to Legionella compliance.
• Strong operational and project management skills, ensuring smooth execution of client contracts.
• Effective communicator with exceptional organizational and leadership abilities.
• Deep understanding of health and safety regulations within the water hygiene industry.
• Experience in chairing and leading meetings, ensuring structured discussions and clear action planning.