Senior Data Analyst

• End-to-end ownership of data projects: extraction, cleaning, transformation, modeling, and visualization.
• Build scalable, high-quality data pipelines and perform advanced data cleaning (Python/SQL).
• Design and maintain interactive dashboards (Power BI/Tableau) with optimized DAX/M-Query and Star Schema data models.
• Analyze workforce, timesheets, reimbursement requests, purchase orders, internal costs, audits, and mission data.
• Collaborate with stakeholders to understand reporting needs and deliver actionable insights.
• Identify opportunities to improve data quality, reporting efficiency, and business processes.

We are looking for a highly skilled Senior Data Analyst to support business control projects in HR, finance, and operations. You will take full ownership of the data lifecycle-from extraction and cleaning to modeling and dashboard delivery. This role is ideal for someone comfortable working with unstructured or "dirty" data and translating it into actionable insights for stakeholders., * Bachelor's or Master's degree in Data Science, Computer Science, Engineering, Business Analytics, or related field.

• 5+ years of experience in Data Engineering, Analytics Engineering, or related roles.
• Experience in business control, finance, or HR analytics.
• Experience in large or complex organizations is a plus.
• Fluent in English.

Required Skills & Competencies:

• Advanced SQL (complex queries, stored procedures, window functions).
• Power BI or Tableau mastery (report development, data modeling, advanced calculations).
• Programming skills in Python or R (data cleaning, transformation, automation).
• Experience handling unstructured, error-prone, or complex datasets.
• Strong analytical, problem-solving, and attention-to-detail skills.
• Ability to communicate technical data limitations to non-technical stakeholders.
• Proactive, curious, and committed to delivering high-quality results.

• Attractive remuneration package.
• Up to 30 vacation days & additional 12 public holidays based on the 40h working week.
• Pension contribution to a tailor-made pension scheme.
• Yearly subscription to the ESTEC gym facilities and a swimming pool.

Octagon Professionals International is a full-service recruitment and HR services firm with 30 years of experience in the European and international market. Our large network of professionals across multiple functional areas, and multi-national team provide flexible solutions customised to individual client needs.