DDDaniel Diaz.
ES/EN

Resume

Daniel Diaz

Data Quality Specialist / Madrid, Spain

linkedin ↗contact →linkedin.com/in/danieldiazarribas/danieldiaz.pro

Data Quality Specialist at Radisson Hotel Group, owning the quality of customer and account data across SAP S/4HANA, SAP Sales Cloud and Reltio MDM. Raised S/4HANA ↔ Sales Cloud sync accuracy from 45 % to 99.8 % and built the Power BI dashboard that keeps it there. Seven years running restaurants and a leisure park before moving into data, so I understand the business that consumes the numbers. SQL, Python, Power BI, Alteryx.

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01Experience

6 roles

Data · 2024–Present

  1. Present20251 yr 8 mos

    Data Quality Specialist

    Radisson Hotel Group · Feb 2025 — Present · Madrid · Hybrid

    Owner of the quality of the group's customer and account data across SAP S/4HANA, SAP Sales Cloud and Reltio MDM: controls, detecting and fixing issues at source, and reporting to management.

    • Raised SAP S/4HANA ↔ SAP Sales Cloud sync accuracy from 45 % to 99.8 %: profiled the mismatches, fixed them at source and defined the controls that keep them from returning.
    • Built the Power BI dashboard for integration health and real-time quality KPIs that management uses to track it.
    • Account deduplication and enrichment with Reltio MDM and Dun & Bradstreet.
    • Recurring cleansing and reconciliation automated with SQL and Alteryx to cut manual review.
    • Audit support: procedures and controls documented and kept current.
    SQLPythonPower BIAlteryxSAP S/4HANASAP Sales CloudReltio MDMDun & Bradstreet
  2. 202520244 mos

    Trainee · Revenue Systems

    Radisson Hotel Group · Oct 2024 — Jan 2025 · Madrid · Hybrid

    Entry into data through the group's revenue systems: issue resolution, data validation and documentation.

    • Troubleshot revenue-system issues and validated rate and inventory data.
    • Wrote system procedures and user guides for the Revenue teams.
    • Promoted to the Data Quality team after four months.
    SQLExcelRevenue Systems

Operations & leadership · 2016–2023

  1. 2023202311 mos

    Venue Manager

    JumpYard Oasiz · Feb 2023 — Dec 2023 · Madrid, Spain

    Full management of a trampoline park: P&L, team, safety, customer experience and reporting to head office.

    • Owned the site P&L: daily tracking of sales, labour cost and margins with weekly reporting to management.
    • Hiring, training, scheduling and performance reviews of the park team.
    • Safety and compliance: internal audits, incident logging and action plans.
    • Analysed footfall and occupancy to adjust staffing, opening hours and promotions.
    P&LKPIsLeadershipAudits
  2. 202320212 yrs

    Store Manager

    Taco Bell · Feb 2021 — Jan 2023 · Madrid, Spain

    End-to-end management of a chain restaurant: results, team, inventory and brand standards.

    • Daily tracking of operational KPIs (sales, food cost, labour cost, service times, satisfaction) and corrective actions.
    • Inventory and ordering control: reduced waste through counts, demand forecasting and variance analysis.
    • Led the team in a high-turnover environment: training, scheduling and developing shift leaders.
    • Passed quality, food-safety and brand-standard audits.
    KPIsInventoryFood costLeadership
  3. 201920172 yrs 1 mo

    Store Manager

    McDonald's · Dec 2017 — Dec 2019 · London, UK

    Ran a high-volume London restaurant after being promoted from Assistant Manager. Fully English-speaking environment.

    • Managed a high-volume restaurant with several shift managers reporting in.
    • Accountable for results: sales, productivity, costs and monthly targets versus budget.
    • Labour planning driven by hourly sales forecasts.
    • Internal and external quality, service and cleanliness audits.
    P&LForecastingLeadershipEnglish
  4. 201720161 yr 4 mos

    Assistant Manager

    McDonald's · Aug 2016 — Nov 2017 · London, UK

    Shift management and support to the Store Manager in a high-volume restaurant.

    • Ran shifts: positioning, service-time control and issue resolution.
    • Cash, ordering and inventory control; shift KPI follow-up.
    • Promoted to Store Manager within 16 months.
    OperationsInventoryEnglish

02Education

  1. 20252024

    Master's Degree in Hotel Management and Restaurant Business

    Ostelea Tourism Management School · EAE Business School — Taken alongside my start at Radisson: revenue management, operations and hotel management.

  2. 20182016

    Higher National Diploma in Sales Management and Commerce

    Universidad Francisco de Vitoria

  3. 20122010

    Higher National Certificate in Computer Systems and Networks

    Escuela Santa María de los Apóstoles — Technical grounding: systems, networking and support — where my ease with the technical side of data comes from.

03Projects

  1. side project

    Beacon TCG danieldiaz.pro/en/projects/beacon-tcg

    Pokémon card price tracker with US and EU markets on the same card page: daily pipeline from two APIs (170k cards, 1.1 M prices), data-quality rules and manual overrides, collections and decks. Next.js + SQLite, self-hosted on a VPS.

    TypeScriptNext.jsSQLiteDockerCaddy

04Skills

Data
SQLPythonPower BIAlteryx DesignerData profilingReconciliationRoot cause analysisQuality KPIs
Enterprise systems
SAP S/4HANASAP Sales CloudReltio MDMDun & Bradstreet
Data governance
Master dataData stewardshipControl documentationGDPR
Other
TypeScriptNext.jsSQLiteDockerGit

05Languages

  • SpanishNative
  • EnglishFull professional proficiency · 3 years working in London