Lead Data Scientist / VP

Citi; Mississauga; On-site; CAD 156,000 - 226,000; Full time

Job summary

Citi is seeking a senior data science professional in Canada to lead advanced analytics, generative AI, and data-engineering initiatives. The role emphasizes translating business questions into measurable models, building robust pipelines, and ensuring responsible AI practices.

Candidates should bring 6+ years of experience in data science or AI, proficiency in Python and SQL, and familiarity with enterprise AI platforms.

Qualifications

• Typically 6+ years of relevant experience in data science, ML, or AI implementation.
• Experience moving solutions from prototyping to production and monitoring.
• Ability to lead complex technical work independently and collaborate across teams.
• Experience in regulated environments is beneficial.

Responsibilities

• Design and implement statistical analyses, predictive models, ML solutions, and analytical frameworks.
• Translate workforce questions into measurable hypotheses, methodologies, and insights.
• Apply regression, classification, clustering, survival analysis, forecasting, experimentation, and causal inference.
• Perform feature engineering, model tuning, validation, and performance evaluation.
• Apply explainability methods like SHAP and scenario analysis.
• Document assumptions, limitations, findings, and business implications.

Skills

Statistical modeling

Python

SQL

Generative AI

MLOps

Explainability

Data pipelines

Cloud platforms

Education

Master’s degree in Data Science or related

Bachelor’s degree with substantial technical experience

Tools

Pandas

NumPy

SciPy

Scikit-learn

PyTorch

TensorFlow

Job description

Key Responsibilities

Advanced Analytics and Statistical Modeling

• Design and implement statistical analyses, predictive models, machine-learning solutions, and analytical frameworks.
• Translate workforce and organizational questions into measurable hypotheses, appropriate methodologies, and actionable insights.
• Apply techniques such as regression, classification, clustering, survival analysis, forecasting, experimentation, and causal inference.
• Perform feature engineering, variable selection, model tuning, validation, sensitivity testing, and performance evaluation.
• Apply explainability methods such as SHAP, feature attribution, and scenario analysis.
• Clearly document and communicate analytical assumptions, limitations, findings, and business implications.

Generative AI and Agentic Solutions

• Design and build Generative AI applications, Retrieval-Augmented Generation solutions, and agentic workflows.
• Implement tool calling, workflow orchestration, structured outputs, multi-turn interactions, and state management.
• Integrate foundation models through approved enterprise gateways and cloud platforms.
• Develop reusable prompts, agents, tools, evaluation components, and analytical services.
• Build evaluation frameworks to measure accuracy, groundedness, retrieval quality, task completion, consistency, and hallucination risk.
• Test and optimize solutions for reliability, performance, latency, cost, and user experience.

Data Engineering and Solution Implementation

• Partner with data engineers and architects to design data pipelines, analytical datasets, feature-generation processes, APIs, and production integrations.
• Develop clean, reusable, and well-documented Python and SQL code for analytical and AI solutions.
• Work with structured and unstructured data from multiple enterprise sources.
• Implement data-quality checks, logging, monitoring, error handling, and traceability within analytical workflows.
• Support the development of feature libraries, embedding pipelines, vector-search capabilities, and model services.
• Move prototypes into scalable production solutions using established MLOps and LLMOps practices.

Governance and Responsible AI

• Ensure solutions comply with applicable Model Risk Management, privacy, cybersecurity, data-governance, and responsible AI requirements.
• Implement appropriate access controls, data entitlements, PII protections, cohort-suppression rules, and analytical safeguards.
• Conduct model-performance, explainability, bias, fairness, stability, and outcome testing.
• Support controls for prompt-injection detection, approved tool use, source grounding, and model-output validation.
• Prepare documentation covering methodologies, data dependencies, testing, limitations, controls, and implementation decisions.
• Partner with risk and control functions to address findings and support required reviews.

Technical Leadership and Collaboration

• Serve as a technical lead for complex data-science and AI initiatives while remaining a hands-on individual contributor.
• Provide technical guidance and peer review to data scientists working on related solutions.
• Help establish standards for coding, analytical design, model validation, testing, documentation, and deployment.
• Partner with product managers, data engineers, architects, technology teams, and business stakeholders throughout implementation.
• Present complex technical concepts and analytical results in clear language for business and senior stakeholders.
• Contribute to delivery planning, solution design, technical decision-making, and resolution of implementation issues.

Experience

Qualifications and Required Skills

• Typically, six or more years of relevant experience in data science, machine learning, statistical modeling, advanced analytics, AI implementation, or a related field.
• Demonstrated experience implementing analytical, machine-learning, or AI solutions in an enterprise environment.
• Experience moving solutions from research and prototyping through validation, production deployment, and monitoring.
• Ability to lead complex technical work independently and collaborate effectively across multidisciplinary teams.
• Experience operating within a regulated environment is beneficial.

Technical Expertise

• Strong knowledge of statistical modeling, probability, regression, classification, clustering, forecasting, experimentation, and model validation.
• Advanced proficiency in Python and libraries such as Pandas, NumPy, SciPy, Scikit-learn, Statsmodels, PyTorch, or TensorFlow.
• Strong SQL skills and experience with data extraction, transformation, analytical cohort development, and data-quality testing.
• Experience designing or implementing Generative AI, Retrieval-Augmented Generation, tool-calling, or agentic applications.
• Familiarity with frameworks such as Google Agent Development Kit, LangGraph, LangChain, CrewAI, or comparable technologies.
• Experience integrating foundation models through enterprise AI platforms such as Google Cloud and Vertex AI, Microsoft Azure, or AWS.
• Understanding of APIs, data pipelines, vector embeddings, semantic search, and production integration patterns.
• Familiarity with MLOps or LLMOps practices, including versioning, testing, deployment, observability, monitoring, and change management.
• Knowledge of responsible AI, model explainability, bias and fairness testing, data privacy, and role-based access controls.

Beneficial Experience

• Experience in People Analytics, Workforce Planning, Human Capital Management, organizational effectiveness, or financial-services analytics.
• Experience working with sensitive workforce data and governed analytical environments.
• Familiarity with enterprise software-development practices, source control, automated testing, and CI/CD.
• Strong written and verbal communication skills, including the ability to explain technical methods to non-technical audiences.

Education

• Master’s degree or Ph.D. in Data Science, Statistics, Mathematics, Computer Science, Engineering, Economics, Operations Research, or another quantitative discipline.
• A bachelor’s degree with substantial relevant technical and implementation experience may also be considered.

Master's degree in Analytics, Data Science, Computer Science.

6+ Years of experience in Engineering or HR Technology.

Experience with Python and JavaScript

AI Automation.

Job Family Group

Decision Management

Job Family

Specialized Analytics (Data Science/Computational Statistics)

Time Type

Full time

Primary Location Full Time Salary Range

$111,600.00 - $161,600.00

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

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