Location: Corsham / Hybrid (2 days on site per week, flexible after initial period) * Day Rate: £425 (Inside IR35, via Umbrella) * Clearance: SC Clearance required * Nationality: UK Sole National RT Consulting deliver innovative change and transformation to the Defence, Government, Policing and Transport sectors. As a Gold ERS Armed Forces Covenant SME with over 15 years’ experience, we support large-scale, complex programmes across multiple frameworks. We are growing our consultant network to support critical commercial programmes with a Defence Client. The Opportunity We are seeking an experienced Commercial Support/Manager to provide commercial support across major defence contracts, including a Global Connectivity Contract (c. £1bn) and an Internet Access Procurement (c. £580m). This role will involve managing complex contract changes, supporting large-scale procurement activity, and engaging with multiple commercial and cross-functional stakeholders. Key Responsibilities * Provide commercial support across large-scale connectivity and digital contracts. * Manage contract changes through the RFC process, ensuring governance and approvals are in place. * Negotiate amendments to RFCs and draft commercial correspondence with suppliers. * Lead on commercial management of obsolescence, recording authority decisions. * Support the procurement of large-scale services, including drafting CCS contract schedules and tender documentation. * Develop evaluation methodologies, pricing models, and social value assessments. * Conduct early market engagement and manage cross-functional stakeholder relationships (finance, product owners, delivery). * Consider IPR implications, manage risk, and support assurance and approvals processes. Skills & Experience Required * Strong background in commercial and contract management, ideally in large-scale digital/telecoms or defence programmes. * Experience with high-value procurement activity and contract change management. * Ability to manage cross-functional stakeholders and negotiate with suppliers. * Proven ability to draft procurement documentation, schedules, and evaluation criteria. * Existing SC Clearance and UK Sole National status are essential. Why Join RT Consulting? * Be part of the RT Society, a growing network of consultants delivering across Defence and Government programmes. * Access to peer support, networking, and collaboration opportunities. * Opportunities to deploy on high-profile, complex transformation projects. * A diverse and inclusive consultancy environment. RT Consultants can work across some of the largest, most complex programmes of work being delivered across the UK and Globally. As a member of our RT Society, we aim to offer you as much support and project continuity as possible. Our RT Society, which is made up of our interim and permanent consultants, offer specialist expertise across our capability areas of expertise such as Project Management, Procurement, Commercial, Planning and Cost, to deliver real strategic and innovative solutions to our partners. We are committed to encouraging a diverse and inclusive workplace where everyone is treated with respect and dignity, ensuring they feel valued, supported, and empowered. We strive to ensure a fair, respectful, and inclusive work environment and value diverse perspectives by ensuring equal opportunities for all, regardless of race, gender, age, disability, or background. By promoting equality and diversity, we aim to create an inclusive environment for our employees to thrive and succeed