We are working with a successful and growing UK manufacturer seeking an ambitious and commercially focused Senior Key Account Manager to join their team based in Hertfordshire. This is an excellent opportunity to join an established business with a strong reputation within the industrial and technical products sector, taking ownership of a portfolio of key customer accounts and supporting continued commercial growth. The role is mainly office based with occasional customer visits, with some flexibility to work from home following probation. The business supplies specialist products and solutions across sectors including construction, infrastructure, engineering, manufacturing, marine and agriculture, and continues to invest in both its people and future development plans. As Senior Key Account Manager, you''ll manage and develop a portfolio of key customer accounts, ensuring strong retention while identifying opportunities to increase revenue, profitability and engagement. You''ll work closely with senior decision-makers, building trusted relationships and developing a deep understanding of customer needs. Working collaboratively with internal teams, you''ll ensure customers receive a high level of service and support. Key responsibilities include: • Managing and developing a portfolio of strategic customer accounts • Building relationships with key stakeholders across purchasing, engineering and operational teams • Creating and delivering structured account development