AI COE - Senior Data Scientist

Ernst & Young Advisory Services Sdn Bhd; Toronto; On-site; CAD 110,000 - 180,000; Full time

Job summary

EY Canada is seeking a Senior Data Scientist to join the AI Centre of Excellence within the Office of the Chief Technology Officer. You will design and deploy advanced ML pipelines, implement LLM solutions, and translate research into enterprise-scale AI applications.

You will collaborate with cross-functional teams, contribute to actionable insights, and uphold responsible AI standards while staying current with AI/ML advancements.

Qualifications

• PhD or Master’s degree in Data Science, Computer Science, AI, ML or closely related field.
• 4–6 years of hands-on experience delivering impactful AI/ML solutions in enterprise or research settings.
• Proficient with Python and deep learning frameworks (PyTorch and/or TensorFlow); data wrangling, feature engineering, and ML pipeline automation.
• Experience with GenAI/LLM architectures, generative AI use cases, and model fine-tuning and deployment.
• Familiarity with ML lifecycle management, ML Ops concepts, and deployment on Azure ML or equivalent cloud platforms.
• Strong team orientation and ability to work in diverse, cross-functional environments.
• Excellent written and verbal communication; able to articulate complex technical concepts and contribute to research outputs.
• Analytical thinker with a track record of innovative solutions to complex technical challenges.

Responsibilities

• Develop, deploy, and optimize ML pipelines for enterprise and research applications.
• Implement, fine-tune, and evaluate large language model (LLM) solutions for diverse use cases.
• Translate academic research into scalable AI solutions aligned with EY’s objectives.
• Support end-to-end model lifecycle including training, validation, deployment, and monitoring.
• Collaborate with data scientists, engineers, stakeholders, and product teams.
• Communicate technical results clearly and contribute to research publications.

Skills

Python

Deep learning frameworks

ML pipeline automation

Data wrangling

GenAI & LLM

Communication

Collaboration

Analytical thinking

Education

PhD or Master’s degree in Data Science/CS/AI/ML

Tools

Azure ML

PyTorch

TensorFlow

Job description

As a Senior Data Scientist, you will be an integral part of the AI Centre of Excellence (COE) within the Office of the Chief Technology Officer at EY Canada. Reporting to the Lead Data Scientist, you will work at the forefront of advanced AI research and development, contributing to the design and integration of intelligent solutions across transformative projects. This position is ideal for those passionate about advancing the state of AI, building robust ML pipelines, and integrating research into enterprise-scale applications. You will play a key role in delivering impactful AI use cases, including large language model (LLM) applications, and help shape the future of artificial intelligence at EY.

Key Responsibilities

• Develop & Deploy AI Solutions: Design, build, and optimize advanced machine learning pipelines for a variety of enterprise and research applications, leveraging best-in-class programming, frameworks, and cloud platforms.
• LLM Application Engineering: Implement, fine-tune, and evaluate large language model (LLM) solutions for diverse use cases, including generative AI, natural language processing, and retrieval-augmented generation.
• Research Integration: Translate cutting-edge academic research into practical, scalable AI solutions aligned with EY's business objectives and innovation agenda.
• Model Evaluation & ML Ops: Support the end-to-end model lifecycle from ideation, training, and validation through deployment and monitoring, applying ML Ops best practices for operational excellence.
• Collaboration & Stakeholder Engagement: Work closely with data scientists, engineers, business stakeholders, and product teams to deliver robust, scalable, and ethical solutions.
• Documentation & Communication: Clearly communicate technical results, methodologies, and insights to both technical and non-technical audiences; contribute to research publications and internal knowledge sharing.
• Continuous Learning: Stay current with the latest advancements in AI/ML, tools, and frameworks; actively contribute to a culture of innovation and excellence within the AI COE.
• Champion Responsible AI: Uphold EY's standards for ethical, equitable, and transparent AI, ensuring compliance with legal and security guidelines.

Required Skills and Qualifications

• Education: PhD or Master's degree in Data Science, Computer Science, Artificial Intelligence, Machine Learning or a closely related field.
• Experience: 4-6 years of hands-on experience delivering impactful AI/ML solutions, ideally in enterprise or research settings.
• Technical Proficiency: Proficient with Python and deep learning frameworks (PyTorch and/or TensorFlow); expertise in data wrangling, feature engineering, and ML pipeline automation.
• GenAI & LLM: Experience with large language model architectures, generative AI use cases, and model fine-tuning and deployment.
• ML Ops & Cloud: Familiarity with ML lifecycle management, ML Ops concepts, and deployment on Azure ML or equivalent cloud platforms.
• Collaboration: Strong team orientation with the ability to work effectively in diverse, cross-functional environments.
• Communication: Excellent written and verbal communication skills; able to articulate complex technical concepts to diverse audiences and contribute to research outputs.
• Problem-Solving: Analytical thinker with a track record of innovative solutions to complex technical challenges.

What working at EY offers

At EY, our Total Rewards package supports our commitment to creating a leading people culture - built on high-performance teaming - where everyone can achieve their potential and contribute to building a better working world for our people, our clients and our communities. It's one of the many reasons we repeatedly win awards for being a great place to work.

We offer a competitive compensation package where you'll be rewarded based on your performance and recognized for the value you bring to our business. In addition, our Total Rewards package allows you to decide which benefits are right for you and which ones help you create a solid foundation for your future. Our Total Rewards package includes a comprehensive medical, prescription drug and dental coverage, a defined contribution pension plan, a great vacation policy plus firm paid days that allow you to enjoy longer long weekends throughout the year, statutory holidays and paid personal days (based on province of residence), and a range of exciting programs and benefits designed to support your physical, financial and social well-being. Plus, we offer:

• Support and coaching from some of the most engaging colleagues in the industry
• Learning opportunities to develop new skills and progress your career
• The freedom and flexibility to handle your role in a way that's right for you

About EY

As a global leader in assurance, tax, transaction and advisory services, we're using the finance products, expertise and systems we've developed to build a better working world. That starts with a culture that believes in giving you the training, opportunities and creative freedom to make things better. Whenever you join, however long you stay, the exceptional EY experience lasts a lifetime.

EY is committed to inclusiveness, equity and accessibility.

EY refers to the global organization, and may refer to one or more, of the member firms of Ernst & Young Global Limited, each of which is a separate legal entity. Ernst & Young Global Limited, a UK company limited by guarantee, does not provide services to clients.