Senior Decision Modelling Lead — Strategy & AI Tools

EY-Parthenon; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

EY-Parthenon in London is seeking an Assistant Director in Decision Modelling to lead complex engagements, shaping strategic and financial decisions for clients.

You will work with Partners, co-develop solutions, manage scope, risk, and client relationships, and drive adoption of AI-enabled tools. The role offers hybrid working across the UK with international travel and opportunities to advance within a global team.

Qualifications

• Deep financial modelling expertise with ability to scope and validate complex work.
• Strong commercial instinct and relationship-building skills.
• Experience leading projects to resolve complex problems.
• Ability to align senior stakeholders and challenge assumptions.
• Experience governing engagement scope, resources, and risk.

Responsibilities

• Lead engagements across full lifecycle from scoping to delivery.
• Co-develop complex solutions with clients and senior stakeholders.
• Manage engagement quality, risk, scope, and economics.
• Identify opportunities and build networks to shape new business.
• Lead and coach teams delivering high-quality work.
• Contribute to development of decision modelling services and AI integration.

Skills

Deep financial modelling

Commercial instinct

Project leadership

Stakeholder management

Engagement governance

Team leadership

AI and data literacy

Education

ACA/ACCA or relevant finance qualification

Tools

Power BI

Power Query

VBA

Job description

EY-Parthenon in London is seeking an Assistant Director in Decision Modelling to lead complex engagements, shaping strategic and financial decisions for clients.

You will work with Partners, co-develop solutions, manage scope, risk, and client relationships, and drive adoption of AI-enabled tools. The role offers hybrid working across the UK with international travel and opportunities to advance within a global team.