Lead Data Business Analyst / Data Subject Matter Expert - Citi

eFinancialCareers; Belfast City District; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid working model

27 days holiday + bank holidays

Competitive base salary (annual review

Job summary

Citi Belfast is seeking a highly experienced Lead Data Business Analyst / Data SME to own data analysis, data architecture and governance across enterprise data ecosystems. You will bridge business, operations, technology and data engineering to ensure accuracy, compliant pipelines and actionable BI.

The role requires 10+ years of experience, expert SQL, strong domain knowledge of Client & Account data, and hands-on BI tool proficiency.

Qualifications

• 10+ years in data analysis, business analysis or data SME roles in enterprise environments.
• Expert SQL skills with complex joins, window functions and data pipeline debugging.
• Hands-on domain knowledge of Client & Account data models and data governance.
• Experience with BI viz tools and data visualization platforms.
• Proficient in Agile/Scrum with Jira and Confluence.

Responsibilities

• Serve as SME for Client Master Data and Account data flows end-to-end.
• Map and maintain data lineage from source systems to reporting.
• Identify bottlenecks and ensure data quality and reconciliation.
• Lead UAT planning, data test cases and cutover validation.
• Collaborate with governance, privacy and regulatory teams.

Skills

SQL

Data lineage

Data governance

BI tools

Tableau

Power BI

Looker

Qlik

Jira

Confluence

Communication

Tools

Oracle

PostgreSQL

Snowflake

Teradata

Job description

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview

We are seeking a highly experienced and analytical Lead Data Business Analyst / Data Subject Matter Expert (SME) with 10+ years of proven experience in data analysis, business analysis, and data architecture within enterprise data ecosystems.

In this role, you will serve as the core Subject Matter Expert for Client and Account data flows , end-to-end data lineage, transaction processing, and data governance. You will bridge the gap between business stakeholders, operations, technology teams, and data engineering to ensure data accuracy, optimal pipeline design, compliance, and actionable business intelligence.

What you'll do

Data Domain Expertise & Data Flow Architecture Serve as the principal SME for Client Master Data, Account Hierarchies, Account Onboarding/Offboarding, KYC/Entity reference data, and downstream data flows .

Map, document, and maintain end-to-end data lineage and data flow diagrams from source ingestion (CRM, core banking, client onboarding systems) through operational data stores, data lakes/warehouses, to downstream reporting and regulatory consumers.

Identify data bottlenecks, discrepancies, latency issues, and breakage points across distributed applications and data pipelines.

Advanced Data Analysis & SQL Engineering Write complex, high-performance SQL queries, stored procedures, CTEs, and window functions across relational and distributed databases (e.g., Oracle, PostgreSQL, Snowflake, Teradata) to perform data discovery, reconciliation, profiling, and root-cause analysis.

Conduct comprehensive data profiling, variance analysis, gap analysis, and trend identification to validate system migrations and data feed integrity.

Define and implement automated data quality rules, validation scripts, and reconciliation frameworks.

Business Analysis & Stakeholder Management Lead requirement gathering sessions with business leaders, compliance teams, operations, and product managers; translate ambiguous business problems into precise technical specifications, BRDs (Business Requirement Documents), and FRDs (Functional Requirement Documents).

Define user stories, acceptance criteria, and data dictionary/mapping specifications for engineering and scrum teams in an Agile/Scrum environment.

Lead User Acceptance Testing (UAT) planning, create complex data test cases, validate data cutover strategies, and oversee test execution.

Data Governance, Metadata & Quality Partner with Data Governance teams to ensure compliance with enterprise data standards, data privacy regulations (GDPR, CCPA), and financial regulatory reporting frameworks (e.g., BCBS 239, Reg reporting).

Define critical data elements (CDEs), data ownership models, business glossaries, and metadata catalogs for the Client and Account data domains.

What we will need from you

• Total Experience: 10+ years of experience as a Data Analyst, Business Analyst, Data SME, or Technical Data Consultant in enterprise environments (preferably Financial Services, Banking, FinTech, or Consulting).
• Technical Mastery (SQL): Expert-level proficiency in SQL (complex joins, aggregations, window functions, query optimization, indexing, and debugging data pipelines).
• Domain Knowledge: In-depth, hands-on domain expertise in Client & Account Data Models , including: Client hierarchy management (Ultimate Parent, Immediate Parent, Subsidiary levels). Account lifecycles (Creation, Maintenance, Settlement/Clearing, Status Transitions, Closure). Counterparty reference data, Party master data, Legal Entity Identifier (LEI) handling.
• Data Flow & Modeling: Proven track record in reverse-engineering data models, creating Entity-Relationship (ER) diagrams, and mapping source-to-target data interfaces (STTM).
• Tools & Methodologies: Proficiency in Agile/Scrum delivery models and tools (Jira, Confluence).
• Experience with BI and Data Visualization platforms (Tableau, Power BI, Looker, or Qlik).
• Communication: Exceptional verbal and written communication skills with proven ability to influence senior business executives and technical leads alike.

What we can offer you

We work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live well and save well.

By joining Citi Belfast, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

• competitive base salary (which is annually reviewed)
• Generous holiday allowance starting at 27 days plus bank holidays; increasing with tenure
• hybrid working model (up to 2 days working at home per week)

A discretional annual performance related