Senior Principal - Portfolio Manager

About the Team: Enterprise Systems is the backbone of GSK’s internal operations in Digital & Tech, enabling GSK Global Functions teams such as Finance, Procurement, HR, Legal, Compliance, WREF, CGA and Corporate Secretariat to run seamlessly. This team designs and delivers cutting-edge digital platforms that power critical processes, ensuring efficiency, compliance, and scalability across the enterprise. Enterprise Systems Management & Business Operations delivers digital solutions that support Enterprise Systems running as a high-performing organization. This team drives financial discipline, operational rigor and strategic alignment across the ES portfolio that safeguard GSK’s integrity and reputation globally. By joining this team, you’ll help shape systems that support thousands of employees worldwide, driving innovation and reliability in the tools that keep GSK moving forward.   Job Purpose: GSK’s Global Supply Chain D&T team is the front facing business tech group supporting GSK’s critical business of Global Manufacturing across all product portfolios. The team comprises of multiple business tech disciplines from site specific D&T partnering through to above site and global services like Data & Analytics and Global Demand & Supply Planning processes. The Team consists of a set of portfolio and business operations manager aligned to GSC D&T Towers and VPs. The team is responsible for defining as well as ensuring portfolio delivery processes, standards, reporting and governance,are adhered to and understood by product owners and VPs across GSC D&T. The team is also responsible for PMO delivery toolset and its maintenance. In addition the team is accountable for business operations for each of the towers, in ensuring all Finance, HC and Contracts are clearly understood and driven with the respective GSC D&T LT members, VPs. Key Responsibilities • Lead the Portfolio Management service for an assigned GSC D&T Tower, partnering with Tower LT and Product Directors to optimise value delivery across projects and epics. • Define, maintain and embed portfolio delivery framework, standards, reporting and governance in line with GSCD&T product/portfolio model and PMO guidance. • Ensure portfolio data quality (scope, status, RAG, milestones, risks, dependencies) and financial information are accurate and ready for governance forums and Portfolio Reviews. • Prepare and lead Tower portfolio review sessions, highlighting key red/amber items, tracking actions to “back to amber/green” and feeding into GSCD&T Portfolio Review. • Support prioritization and discretionary budget allocation decisions across the Tower using data-driven insights on Capex/Opex, benefits, risks and impacts. Ensure every initiative has a baseline, a named benefit owner and a measurement schedule, track benefits beyond closure, and feed actuals back into prioritization. • Work closely with Finance and the Senior Business Operations Manager to ensure finance, headcount and contract/vendor information is clearly understood, controlled and reflected in portfolio reporting. • Champion GSCD&T portfolio standards and tools (Aha! workspaces, ADO/Jira integration, Power BI dashboards) and support teams to adopt. Coach Product Owners and Tower teams on portfolio discipline so that transparency improves at source. • Provide support to projects on managing risks, cross-stream dependencies and impediments, escalating through Tower LT and GSCD&T governance where needed. Hold the integrated Tower plan (sequencing, dependencies, capacity and RAID), challenge delivery on pace and evidence, and escalate before impact through Tower LT and GSCD&T governance. • Partner during planning sessions/BRPs to assess value, dependencies and capacity across the portfolio and ensure al