Senior Manager, GTM Effectiveness Strategic Portfolio Management

Job Description 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.

Key Responsibilities Portfolio Governance and Assurance
• 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 work streams
• 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 Cross-Organizational Visibility and Finance Impact Tracking
• 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 Sage delivery teams

Resource and Capacity Management
• Maintain the portfolio resource heatmap across transformation activities and wider Sage demand
• Escalate resourcing gaps, over-allocation risks, and capacity constraints ahead of planning cycles

Benefits Tracking and Realization
• Maintain the portfolio benefits register for all approved business cases
• Produce quarterly benefits realization reporting comparing actuals against forecast
• Establish benefit baselines and measurement approaches with workstream leads and Benefits Owners prior to go-live Knowledge Management
• Maintain lessons learned registers and support periodic retrospectives
• Onboard new Project Managers and workstream leads to portfolio governance standards.

Qualifications:

• Proven experience in PMO or program governance within a complex, multi-workstream environment
• Demonstrated ability to maintain governance artefacts to internal audit standard
• Strong organizational discipline and confidence to challenge governance quality where required
• Clear and concise communication skills, with the ability to produce senior-level reporting independently
• Proficiency in Microsoft Office, particularly Excel and Power Point Desirable
• Experience with in Finance or Finance Transformation program including ERP or Finance Operations initiatives is a plus
• Exposure to program benefits realization tracking is a plus.
• Experience with in a FTSE or large enterprise environment with formal internal audit requirements.

Key performance indicators:
• Plans, RAID logs, decision logs, and change registers remain current and audit ready across all active work streams
• Portfolio Headline Reports delivered on schedule with no missed reporting cycles
• All work streams reviewed in line with the agreed assurance calendar,…