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 Role
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.
Key Responsibilities
* 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.
Qualifications & Experience
* 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.
Salary & Benefits
* Salary sacrifice for purchase of electric vehicles
* Salary up to £45,000 plus car allowance
* Smart Health/digital GP service
* Permanent additional day annual leave for 5, 10 & 15 years – MSS
* For the year only – additional day annual leave for 10, 20, 30, 40 & 50 years – RSK
* Cycle to work scheme
* Wellbeing ambassadors – network of internal mental health first aiders
* Gym/lifestyle discounts
* Bereavement counselling
* Life assurance – 3 x annual salary payments for death in service
Equal Opportunity
The RSK Group is an equal opportunity company. We actively encourage applications from candidates of all genders, races, ethnicities, ages, neurotypes, religions or beliefs, sexual orientations and those with disabilities. We are committed to fostering an inclusive workplace that welcomes individuals from all backgrounds, experiences, and perspectives.
About Us
Based in Cardiff, Wales, we are a 500‑strong company of skilled professionals operating in regulated and frequently hazardous environments, providing industrial and commercial cleaning, waste management, asbestos removal, water treatment and security services, in addition to asbestos consultancy and retrofit work. Working across the public and private sectors, we are known for being highly responsive and focusing on proactive client management, delivering the best outcomes for our clients.
Our clients are diverse and include large multinational businesses, tier‑one contractors and public‑sector bodies. Joining MSS is an opportunity to expand your technical remit and work at a company that prioritises its workforce, giving them an opportunity to succeed. We value our people and want them to make the right decisions in the course of their work and succeed with us.
The MSS Group is part of the RSK Group, a leading integrated environmental, engineering and technical services business providing dynamic, multidisciplinary services to a wide range of sectors. RSK was founded in 1989 and has grown considerably since then.
At RSK, we operate as a group of businesses that work together seamlessly, aiming for growth through diversification. Our strategy helps us build a strong and resilient business, capable of weathering external challenges, while also providing greater value to our clients and more opportunities for our employees.
Since the beginning, our philosophy has remained the same: employ, develop and reward talented individuals. People are crucial to our company, and we recognise that our success hinges on our colleagues' growth. We're committed to preserving RSK's people‑first culture, promoting innovation, and fostering a supportive and caring environment for collaboration. At RSK, we want you to be part of our successes and help you reach your career aspirations. We take pride in offering employees fulfilling and challenging careers by promoting ongoing growth and empowering individuals to excel.
We are committed to fostering an inclusive workplace that welcomes individuals from all backgrounds, experiences, and perspectives. By providing workplace adjustments, we make it easier for people to confidently explore and pursue our career opportunities and recognise that flexibility is key to fostering a dynamic and thriving workplace. Many of our office‑based positions benefit from a flexible working arrangement, allowing our team members to achieve a balance between professional and personal commitments.
If you're passionate about making a difference, join us as we work together to build a brighter, more equitable, and sustainable future for all. Do you have what it takes?
Seniority level
Mid‑Senior level
Employment type
Full‑time
Job function
Sales and Business Development
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