{"id":2294373,"url":"https://alion.io/job/oliver-james-associates-data-functional-analyst","title":"Data Functional Analyst","company":{"id":4413055,"name":"Oliver James Associates","domain":"ojassociates.com","url":"https://alion.io/company/oliver-james-associates","size_band":null,"is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Analytics","role_family":"Analytics","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Brussels, Belgium"],"countries":["BE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":42000,"max_usd":113000,"period":"year","method":null,"sample_n":6682},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ETL/ELT","optional":false},{"name":"PostgreSQL","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-05T07:15:29Z","employer_posted_date":null,"last_verified_at":"2026-10-05T07:15:29Z","board_verified":false,"closed_at":null,"days_open":9,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":9},"description":"About the RoleOliver James is partnering with a leading enterprise organization migrating its core legacy systems from Adabas (Mainframe) to PostgreSQL.\nWe are seeking a Data Functional Analyst to bridge the gap between legacy business logic and modern database architecture. Working directly alongside Data Engineers and DBAs, you will define data mappings and ensure a seamless, high-integrity migration.\nKey ResponsibilitiesLegacy Data Analysis & Mapping: Deep-dive into Mainframe data structures and define accurate functional target mappings to PostgreSQL relational schemaq.\nTechnical & Functional Guidance: Act as the primary functional advisor for Data Engineers and DBAs, writing clear functional specifications to guide ETL/ELT pipeline development and schema design.\nData Quality & Reconciliation: Design data validation strategies, define test scenarios, and execute cross-database reconciliation checks (Mainframe legacy vs. PostgreSQL) to guarantee 100% data integrity and consistency.\nData Lineage & Documentation: Maintain comprehensive data dictionaries, mapping rulebooks, and lineage documentation throughout the migration lifecycle.\nCross-Functional Collaboration: Serve as the functional point of contact for resolving legacy data ambiguities and translating complex business rules for the technical delivery team.\n\nRequirements & QualificationsFunctional Data Expertise: 3 years of experience as a Data Functional Analyst, Business Data Analyst, or Data Consultant on large-scale data transformation projects.\nDatabase & SQL Skills: Strong, mandatory expertise in PostgreSQL and advanced proficiency in SQL and relational data modelling concepts.\nMainframe Experience: Solid functional understanding of Mainframe database environments (knowledge of Adabas is nice to have, but not mandatory).\nMigration Track Record: Hands-on experience working on complex legacy-to-relational data migration projects.\nLanguage Skills:Fluent English (written and spoken).\nProfessional fluency in French and/or Dutch (essential for local team and business stakeholder collaboration).\n\nCommunication & Mindset: Excellent analytical skills, rigorous attention to detail, and the ability to articulate complex functional rules clearly to technical 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