Senior Data Engineer

About L.E.K. Consulting:L.E.K. Consulting is a premier global strategy consulting firm that partners with clients to solve their most critical business challenges and deliver high-impact outcomes. We bring deep industry expertise and rigorous, evidence-based insight to global corporations, growth companies and private equity investors, helping them turn strategy into action.How do we deliver impact? It’s the people. We hire exceptional individuals and invest in their growth through hands-on client work, close collaboration and a culture of ownership, inclusion and continuous learning. Across every level, curiosity unites us and challenge excites us.Founded more than 40 years ago, L.E.K. employs more than 2,200 professionals worldwide and is consistently recognized as one of the industry's best firms to work for. For more information, visitlek.com.About the Role:We are seeking a Senior Data Engineer with deep expertise in data engineering and a strong working command of AI and LLM tech stacks. This role sits within our Data Science & Engineering team and operates at the intersection of large-scale structured and unstructured data, infrastructure and AI while building the pipelines, platforms, and apps that power client engagements and L.E.K.'s proprietary analytical products The ideal candidate brings fluency in production data engineering (e.g., cloud platforms, pipelines, warehousing, and scalable app deployment) and in building and shipping LLM-based and agentic AI solutions. You will work directly with clients across multiple industries, translating complex technical work into measurable commercial outcomes, owning delivery across client engagements and internal IP development while working with data scientists, strategy consultants, and client teams to build solutions that create high client impact Responsibilities:Client engagements: Lead end-to-end data engineering and AI/ML projects from conceptualization through deployment in clients' cloud environments, optimizing for scalability, performance, and reliability Design and deliver data pipelines, data models, and infrastructure that underpin analytical and AI solutions for client use casesSupport clients in defining and executing data and AI strategies, translating business objectives into actionable technical roadmaps and governance frameworksLead or contribute to agentic AI engagements, designing and deploying multi-agent architectures and automation workflows that deliver measurable client outcomesSupport technology due diligence engagements, assessing data infrastructure, AI/ML capabilities, engineering practices, and technical risks of target organizationsGuide clients through the interpretation of analytical outputs and integration of data-driven insights into their business workflows Client / business development: Support Managing Directors in developing and scoping client proposals where data engineering and AI capabilities are central to delivery Serve as the technical interface between the Data Science & Engineering team, consulting partners, and clients while ensuring alignment on fit, feasibility, and delivery expectationsTranslate technical requirements, outputs, and constraints into clear, actionable language for client-facing presentations and proposalsSupport the design and commercialization of new offerings across data strategy, AI strategy, agentic AI, and LLM-powered analyticsContribute to internal enablement by keeping Managing Directors informed of current data strategy and AI capabilities Capability development:Drive development of scalable, production-grade data pipelines and ETL/ELT processes that feed L.E.K.'s proprietary analytical products and client-facing tools Build and maintain cloud data infrastructure (e.g., warehouses, data lakes, and data models) that support both internal service lines and bespoke client solutions Develop AI-powered analytical applications, leveraging LLMs, RAG architectures, and ML techniques to solve complex client problems Champion best-in-class engineering practices in data quality, CI/CD, containerization, and scalable architecture across all IP assets Stay current on best-in-class data engineering tooling, cloud platforms, and AI/LLM frameworks; contribute to the D&A technical roadmap, including platform architecture and engineering standards Proactively identify new use cases where data infrastructure or AI can deliver outsized value for clients or strengthen internal firm capabilities Collaborate with data scientists, product owners, and consulting stakeholders to continuously innovate on the apps and proprietary data assets we offer Qualifications: Data engineering: 4+ years of experience in applied data engineering, with a strong track record delivering scalable, production-grade data solutions Mastery of data modeling, ETL/ELT pipeline design, and working with large-scale structured and unstructured datasets Strong Python and SQL skills; fluency in core data engineering libraries (e.g., PySpark, Apache Airflow) and familiarity with Big Data tools such as Spark or Scala Hands-on experience designing and deploying data solutions on Azure (preferred) or another major cloud platform (e.g., AWS, GCP); familiarity with on-prem platforms such as Microsoft SQL Server Hands-on experience with APIs (e.g., FastAPI), containerization (Docker, Kubernetes), DevOps practices, Git, and CI/CD pipelines Hands-on experience with Microsoft Fabric across multiple workloads (e.g., Data Factory, Lakehouse, semantic models, Power BI) Familiarity with building and deploying cloud-based analytics web applications is preferred Familiarity with one of the cloud data warehouses (e.g., Snowflake, BigQuery, Redshift) and data lake architecture is preferred AI engineering: Hands-on experience developing and deploying LLM-based applications in production, including RAG pipelines, prompt engineering, and LLM evaluation Experience designing agentic AI systems (e.g., multi-agent orchestration, or automation workflows) using frameworks such as LangChain or equivalent Familiarity with at least one major cloud AI platform (Microsoft Foundry, AWS Bedrock, or GCP Vertex AI) and associated deployment patterns Familiarity with understanding of LLM evaluation frameworks (e.g., Ragas, LangSmith) and retrieval quality assessment is preferred Familiarity with core agentic AI and LLM libraries (e.g., Transformers, LangGraph, Pydantic AI) and experience applying them in production settings is preferred Stakeholder engagement: Ability to understand and articulate requirements to technical and non-technical audiences, working alongside data science, engineering, and consulting teams Prior experience in strategic consulting is preferred; exposure to one or more of L.E.K.’s core sectors (life sciences, healthcare, consumer, industrials, TMT) is a strong plus Strong problem-solving skills with the ability to translate business needs into technical solutions; comfortable working at pace in a fast-paced, entrepreneurial environment with a high degree of ownership Education:Degree in a quantitative and/or business discipline preferred, examples include: Computer Science, Engineering, Statistics, Data Science, Mathematics, Operations Research, Economics Why Join L.E.K.? Drive the growth of a rapidly expanding data-driven capability in a top-tier strategy consulting firmCollaborate with C-suite clients and life sciences innovators to deliver market-shaping insightsBe a leader in L.E.K.’s evolving Data & Analytics and digital solutions strategyJoin a supportive, entrepreneurial, and intellectually curious team with access to cutting-edge tools and professional development Additional Information: The expected base salary for this position is $135,000 - $141,750 annually. Actual compensation will be determined based on experience, qualifications, skills, and location. This position may also be eligible for discretionary bonus and a comprehensive benefits package. L.E.K. Consulting offers a competitive total rewards package including medical, dental, vision, life and disability insurance, 401(k) with employer contribution, HSA contributions (where applicable), paid time off, and other firm-sponsored benefits.This role is based in our Boston, Chicago, Los Angeles, New York, or San Francisco offices and follows our hybrid work model for U.S. offices. We require employees to be in their assigned home office Tuesday, Wednesday, and Thursday each week, as well as the first Friday of each month.Applicants must be legally authorized to work in the United States on a permanent basis without the need for employer sponsorship. Unfortunately, we are unable to consider candidates requiring visa sponsorship, including but not limited to H-1B, TN, F-1 (OPT/CPT/STEM), or other work authorization.L.E.K. Consulting is an Equal Opportunity Employer. We are committed to providing equal employment opportunities to all qualified individuals regardless of race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.In accordance with applicable state and local laws, we will provide reasonable accommodations for qualified individuals with disabilities and for sincerely held religious beliefs, practices, or observances.For more information and to apply, please visit: #LI-DE1