We’re on the lookout for a Senior Process Engineer with extensive experience in clean water treatment to lead the design and optimisation of critical infrastructure projects. This is your chance to make a tangible impact in a role that blends technical expertise, leadership, and strategic thinking. This is a long term outside IR35 contract position with flexibility for hybrid working. What You’ll Be Doing: * Collaborating with multidisciplinary teams to develop and appraise cutting-edge process design solutions * Delivering expert technical support across complex capital projects, from concept through commissioning * Producing key project documents including scopes of work, design drawings, CDM documents, and job packs * Preparing and reviewing process design calculations, and evaluating contractor inputs * Assessing Whole Life Costs and TOTEX options to inform design and investment decisions * Developing asset performance guarantees and risk-assessed, value-driven solutions * Supporting commissioning of schemes and ensuring seamless integration of new assets * Liaising with stakeholders to progress approvals and maintain project momentum * Driving innovation in process optimisation and evaluating new technologies * Mentoring junior engineers and promoting a culture of continuous development and chartership What We’re Looking For: * Degree-qualified in Chemical Engineering or a related scientific/engineering field * Chartered Engineer or actively working towards chartered status * Minimum 5 years' experience in process engineering, with a strong focus on clean water treatment * In-depth knowledge of clean water processes and awareness of wider environmental or utility sectors * Recognised for technical excellence and industry leadership * Proficient in CDM 2015 and familiar with NEC contract application * Skilled communicator who can influence and collaborate at a senior level * Advanced IT skills, particularly in Microsoft Office or Google Workspace * Demonstrated ability to manage time, budgets, and competing priorities * Strong understanding of industry regulations, standards, and specifications * Experience in budget management and cross-functional project leadership Only those with proof of right to work will be considered