Senior Manager, GTM Effectiveness Strategic Portfolio Management

About the role

The GTM Effectiveness Portfolio Manager supports the operational governance, planning, and executive visibility of the GTM Effectiveness transformation portfolio. The role enables disciplined demand intake, business case validation, prioritisation, quarterly planning, capacity planning, and portfolio health management to ensure the right work is assessed, sequenced, funded, and delivered against strategic GTM priorities. The role does not manage individual project governance forums, which remain the responsibility of Project Managers and delivery leads. Instead, it provides portfolio-level oversight across GTM Effectiveness to ensure demand is proactively managed, dependencies and capacity impacts are visible, funding requirements are understood, business cases are validated, and portfolio decisions are supported by clear, consistent data. The role requires strong organisational discipline, attention to detail, confidence to challenge priorities and governance standards where required, and the ability to provide concise executive portfolio reporting to senior stakeholders. It plays a critical role in creating transparency, improving decision quality, and enabling GTM Effectiveness to deliver transformation outcomes with pace, accountability, and operational rigour.

Responsibilities

• Review and quality assure Plans, RAID logs, decision logs, and change registers across all projects/programmes, ensuring records remain current and audit ready
• Conduct governance assurance reviews across Tier 1 and Tier 2 initiatives, while monitoring effective self-governance across Tier 3 workstreams
• Produce the fortnightly Portfolio Headline Report covering RAG status, milestones, key risks, and decisions required
• Monitor delivery plan adherence, escalating variances and blockers where required
• Maintain portfolio delivery and assurance metrics, providing visibility of governance performance
• Support intake triage and initiative assessment with the Innovation and Automation team
• Maintain a live register of wider Sage initiatives impacting Finance resource capacity
• Produce and maintain a fortnightly Finance Impact Tracker, escalating resource conflicts proactively
• Act as the coordination point between the Finance Transformation PMO and wider