EY · 11 hours ago
Lead Data Scientist, AI Centre of Excellence
Toronto, Ontario, Canada
Full-time
Onsite
Senior Level, Lead/Staff
$110K/yr - $160K/yr
7+ years expEY is a globally connected powerhouse of diverse teams, committed to building a better working world. The Lead Data Scientist will guide the AI strategy, lead the design and implementation of advanced AI models, and drive innovation across transformative projects.
AccountingAdviceBusiness IntelligenceConsultingFinancial ServicesProfessional Services
Responsibilities
Lead AI Strategy: Define and execute the overarching AI strategy in alignment with EY’s business goals, collaborating with cross-functional leaders and technology stakeholders
Leadership Responsibilities: Inspire and lead a team of data scientists and engineers, fostering collaboration and innovation. Drive the vision for AI initiatives and ensure alignment with organizational objectives. Facilitate knowledge sharing and continuous learning within the team
Oversee Model Architecture & Innovation: Architect, evaluate, and refine complex models, including transformers, LLMs (Large Language Models), and retrieval-augmented generation (RAG) solutions for diverse enterprise use cases
Long-Term Innovation Focus: Drive long-range planning for AI capabilities, champion emerging technologies, and identify opportunities for disruptive innovation in AI/ML applications across business verticals
Research Leadership: Publish and drive high-impact research papers and thought leadership in journals and conferences; represent EY at industry forums
Model Lifecycle & ML Ops: Lead end-to-end model lifecycle management, from ideation and training to deployment and monitoring, leveraging ML Ops best practices and Azure ML
Stakeholder Collaboration: Partner with business, engineering, and product teams to translate visionary AI concepts into robust, scalable solutions delivering measurable value
Champion Responsible AI: Ensure AI systems adhere to ethical, legal, and security guidelines; promote equity, transparency, and accessibility in all initiatives
Qualification
Required
PhD or Master's degree in Artificial Intelligence, Machine Learning, Data Science, Computer Science, or a closely related field
7–10 years of progressive experience delivering impactful AI/ML solutions, with a proven track record in architecting and scaling NLP, AI and GenAI systems
Deep expertise with generative AI models, transformer architectures, LLM fine-tuning, and deployment of RAG pipelines
Hands-on experience with ML lifecycle management, ML Ops frameworks, and Azure ML (or equivalent cloud ML platforms)
Strong programming skills (Python or similar), deep learning frameworks (PyTorch, TensorFlow, Hugging Face), and data engineering for large-scale modeling
Proven ability to publish research, file patents, or contribute thought leadership in AI/ML
Demonstrated success in leading AI initiatives, developing technical roadmaps, and inspiring high-performance teams
Exceptional written and verbal communication skills with the ability to articulate complex AI concepts to technical and non-technical audiences
Passion for building equitable, accessible, and responsible AI systems; ability to work in diverse, inclusive teams
Benefits
Discretionary bonus program
Comprehensive medical, prescription drug and dental coverage plan
Defined contribution pension plan
Great vacation policy plus firm paid days that allow you to enjoy longer long weekends throughout the year
Statutory holidays
Paid personal days (based on province of residence)
Support and coaching from some of the most engaging colleagues in the industry
Learning opportunities to develop new skills and progress your career
Freedom and flexibility to handle your role in a way that’s right for you
Company
EY is building a better working world by creating new value for clients, people, society, the planet, while building trust in the capital markets.
10001+ employees
Funding
Current Stage
Late StageLeadership Team
Jonathan Williamson
Chief Operating Officer
Abhishek Sen
Partner
Recent News
2026-01-16
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