Client Onboarding Project Manager

We’re seeking a hands‑on, results‑driven Client Onboarding & Project Manager to join our team. Constellia is a dynamic and growing business committed to delivering exceptional service to our clients. We are building a strong operational infrastructure to support our continued growth — and this role sits at the heart of that mission. Key Responsibilities Lead and manage strategic ad‑hoc projects, ensuring timely delivery and alignment with organisational objectives. Own and enhance the full end‑to‑end client onboarding process (Gold, Silver, Bronze clients), ensuring a smooth and professional implementation experience. Continuously improve the customer journey by working closely with senior stakeholders including the CEO, MD, COO, and heads of key business units. Drive a variety of project types — from business operational improvements to technology platform rollouts — acting as the central PMO owner. Anticipate and address potential risks, roadblocks, or opportunities before they arise, applying a proactive mindset. Collaborate with cross‑functional teams (senior management, business units, technical teams, external partners) to ensure successful and cohesive project delivery. Ensure all tasks are delivered on time, to high quality standards, and in line with company goals. Identify and implement best‑practice project management processes to help the company scale efficiently. What We’re Looking For GCSE Maths and English (or equivalent) level 4+; degree‑level education (or equivalent experience) preferred. Proven experience as a Project Manager — ideally in a fast‑paced, rapidly growing environment. Experience with client implementations or technology‑based projects is a strong advantage. Demonstrable track record of delivering multiple projects on time, on budget, and with measurable outcomes. Excellent communication, interpersonal and stakeholder management skills — capable of engaging and influencing at all levels. Strong ability to manage multiple projects simultaneously while balancing competing priorities. A proactive, self‑starting attitude, with a high level of initiative and the ability to work independently when required. Experience or familiarity with practical project management tools and techniques. We value pragmatic execution over rigid adherence to methodology. Additional Requirements Ability to pass baseline security screening (BPSS). In some cases, Security Check (SC) clearance may be required. Whats in it for you? A key role in a growing and ambitious company, with plenty of opportunity to shape and influence the client experience and internal processes. Hybrid working model, your birthday off as an extra holiday (+ 25 days), office attendance bonus, life insurance, company events, free all day café. A chance to lead diverse projects across business operations and technology platforms — broadening your exposure and experience. A collaborative, supportive culture that values initiative, efficiency, and delivery. Seniority level Mid‑Senior level Employment type Full‑time Job function Project Management and Information Technology Industries Business Consulting and Services Constellia – Neutral Vendor solutions for Goods, Services, Technology and Works. Established in 2007, Constellia is one of Britain’s fastest‑growing private companies (ranked in Sunday Times 100 2024 & 2025), and a leading Neutral Vendor Managed Service Provider in the UK. We manage over £400 million of spend across 200+ public and private sector organisations. We are also the UK’s only Neutral Vendor to enable public sector and utility client’s access to the procurement of Goods, Works, Services and Technology. As a Neutral Vendor, we act as a conduit between contracting authorities, prequalified suppliers, providing a fast and compliant marketing route via Neutral Vendor Frameworks. Our diverse and dynamic marketplace enlists over 3,000 pre‑approved suppliers, providing clients access to 400+ subcategories of spend. We provide public sector clients the flexibility and choice to buy through one simple route quickly and compliantly, helping drive efficiencies, Social Value and savings. #J-18808-Ljbffr