At John Sisk & Son, we’re more than a construction company. We’re a family-owned business with a global reach, committed to building excellence in every project. We deliver trust, certainty and value to our clients while embracing innovation and shaping the future of construction. The Senior Buyer will play a critical role in managing the procurement of materials and plant across a variety of construction projects. Operating as a key link between project teams, supply chain partners, and internal stakeholders, this role ensures procurement strategies are aligned with company procedures, deliver value for money, and support the successful delivery of construction projects. The ideal candidate will bring deep knowledge of construction materials, a strategic mindset, and the ability to support both operational and commercial goals through effective supplier engagement and cost management. Support project teams and P rocurement colleagues by managing the end-to-end procurement process for materials and plant in line with company procedures. Collaborate with the work-winning team to obtain quotations and pricing as required during bid and tender phases. Lead and contribute to procurement meetings; assist in developing project or bid-specific procurement strategies. Liaise with the Supply Chain Manager to negotiate, agree, and maintain supplier rates and long-term agreements. Ensure mandatory compliance with preferred supplier agreements and maximise the use of all preferred or third-party procurement frameworks to drive rebate generation. Maintain and support preferred supplier relationships, including coordinating and participating in regular review meetings. Identify risks, opportunities, and alternatives during both tender and construction phases to give the business a competitive advantage. Promote best value sourcing principles (not just lowest price) throughout all procurement activities. Work with the Purchasing Manager to increase the adoption and effective use of e-catalogues on live sites. Provide feedback on product innovations and market trends, sharing key insights with relevant internal stakeholders. Support the resolution of supplier performance concerns and act as a neutral party to mediate supplier disputes if required. Manage and resolve accounts and invoice queries related to procurement activities. Represent the company at supplier or client-led workshops, seminars, and industry forums as required. Provide guidance and mentoring to junior members of the procurement department. Support in the development of team capability and knowledge sharing within the department. Lead by example and promote a culture of continuous improvement and accountability. 5Over 7 years’ experience in a procurement function, with a minimum of 3 years within the construction industry. Demonstrated success in managing procurement activities with measurable cost savings and value creation. Strong technical knowledge of construction products, plant, and systems. Deep understanding of the construction supply chain and current market conditions. Experience in managing, mentoring developing junior members of the Procurement team Excellent financial, commercial and analytical skills. Proven ability to manage workload effectively with minimal supervision. Highly proficient in COINS ERP system and Microsoft Excel. Strong interpersonal and negotiation skills. Able to work cross-functionally with commercial, operational, and site-based teams. Degree or equivalent qualification in Procurement, Supply Chain Management, Quantity Surveying, or Construction Management. CIPS qualification (or working toward). Competitive salary 26 days annual leave Pension and benefits Unlimited learning and development opportunities Much more Our People and Recruitment Commitment At Sisk Group our people are at the heart of our success. We offer the chance to work with purpose, build a career with no limits and be part of a great team. All vacancies are managed directly by our Internal Recruitment Team. Unsolicited contact or speculative CVs from unapproved agencies will not be accepted and no introductory fees will apply. We are an equal opportunities employer. We welcome applications from all qualified candidates regardless of gender, race, ethnicity, disability, age, sexual orientation, religion or any other protected characteristic. Reasonable adjustments are available during the recruitment process. We know the confidence gap and imposter phenomenon can stop talented candidates applying. You do not need to meet every criterion – your skills and potential matter. Don’t hold back we want to hear from you. All recruitment materials comply with legal and regulatory requirements including the EU Pay Transparency Directive and the Equality Acts UK and Ireland. LI-RB1