About The Company

TSI GmbH is part of a global leader in the measurement of aerosols, airflow, air quality, and biological risks. TSI instruments support customers in hospitals, research laboratories, industrial facilities, pharmaceutical environments, and construction sites, where accurate measurement and safety are essential. Our work helps organizations understand and manage the conditions that affect people, products, and processes.

At TSI, you will join an international team committed to technical excellence, dependable service, and continuous improvement.

About The Role

TSI GmbH is seeking a Senior Accountant (m/f/d) to oversee accounting operations for our entities in Germany and France. This is a hands-on role with responsibility across the accounting cycle, from daily transactions through month-end reporting and year-end close preparation. You will work closely with the Regional Director of Finance, contribute to reliable financial reporting, and help improve accounting processes across both countries.

The position also offers the opportunity to mentor local colleagues and grow toward a leadership role, with potential responsibility for a team of up to two employees.

Qualifications

- Completed commercial training or a degree in business administration, accounting, or a related field. Further training as a certified balance sheet accountant is an advantage.
- At least five years of accounting experience, ideally including general ledger ownership or a comparable senior accounting position.
- Strong knowledge of financial close processes, account reconciliations,



and value-added tax requirements.
- Experience with accounting software; SAP experience is preferred.
- Confident user of Microsoft Office, especially Excel.
- Very good German and English skills. French language skills are an advantage.
- A structured, discreet, and dependable working style, combined with a practical, hands-on approach.
- Motivation to take ownership, support colleagues, and develop toward people-management responsibilities.

Responsibilities

- Manage day-to-day accounting for the German and French entities, including accounts payable, general ledger, fixed assets, and payroll-related postings.
- Oversee bank accounts, payment runs, cash-related activities, and intercompany accounting and reconciliations.
- Prepare monthly closing activities, complete account reconciliations, investigate variances, and provide clear analysis to support accurate reporting.
- Coordinate the preparation of annual financial statements with external tax advisors and auditors.
- Prepare and submit VAT advance returns, recapitulative statements, and Intrastat declarations in line with applicable requirements.




- Maintain appropriate documentation and support compliance with internal controls, accounting standards, and local regulations.
- Identify opportunities to standardize, digitize, and automate accounting processes, and help implement sustainable improvements.
- Act as a mentor and knowledgeable point of contact for the local team, with the opportunity to assume direct responsibility for up to two team members over time.

Benefits At TSI, you will have meaningful responsibility across two countries, direct collaboration with finance leadership, and the opportunity to influence how accounting work is performed. We offer a explicit development path toward a leadership position, flexible working hours, and the option to work from home up to two days per week. You will also have access to individual training and career development opportunities, an international and welcoming team environment, an attractive salary, and additional benefits. Short decision-making paths enable you to contribute ideas and see the impact of your work.

To apply, please submit your application in English, including your salary expectations and earliest possible start date. Applications may be addressed to TSI GmbH, Marcus Kernbach, European HR Manager, Neuköllner Straße 4, 52068 Aachen.

Equal Opportunity

TSI GmbH is committed to providing an inclusive and respectful workplace. We welcome applications from qualified candidates of all backgrounds and make employment decisions based on role-related qualifications, skills, and experience.

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