Inter Shared Service GmbH – Your Partner for Interim Accounting

We support you flexibly and reliably with tailored interim solutions in accounts payable and receivable accounting.

Our core expertise lies in working with the ERP systems SAP R/3 and SAP S/4HANA. In addition, we also handle general ledger tasks in DATEV. Through numerous projects, we have gained extensive experience – particularly in dealing with insolvency proceedings and business transfers in accordance with § 613a BGB.

Benefit from a well-coordinated, scalable accounting team – efficient, experienced, and ready to act at any time.

intro
about us vision

OUR VISION

In an increasingly digitalized and crisis-weakened business world, companies rely on highly qualified SAP accounting experts. We ensure your stability through our temporary support until your company is ready to manage it again on its own.

Our vision is to provide you with team-based solutions for SAP interim assignments.

We stand for flexibility and quality. Our experts provide immediate support in times of shortage and take on critical tasks. Through our customer-oriented approach, we deliver tailored solutions.

Our goal is to redefine interim management in SAP & DATEV accounting – through rapid availability and the highest level of expertise.

In short: We combine SAP & DATEV excellence with maximum flexibility – for your success.

about us mission

OUR MISSION

Our mission is to support companies with tailored SAP interim accounting solutions. We provide highly qualified experts who bridge operational vacancies.

With in-depth expertise in finance and procurement processes, we ensure seamless transitions, maximum process reliability, and sustainable efficiency gains. Our aim is to make companies more flexible, agile, and crisis-resistant – whether through short-term bridging, strategic optimization, or outsourcing.

20+
Years of Experience
30+
Successful Projects
10+
Industries Served
Our Team

Meet Our Experts

Experienced executives and highly qualified specialists form the heart of our company. Together we develop innovative, tailored solutions that drive businesses forward sustainably.

team member

Olaf Beyer

Managing Director


I combine many years of leadership experience with in-depth expertise in the areas of Procure-to-Pay and Global Procurement Controlling – I would be delighted to support you in sustainably optimizing your processes.

team member

Manja Kaulfuß

Head of Accounting


With over 20 years of experience in financial accounting, I ensure precise reporting, stable processes, and transparent structures.

doreen wirth

Doreen Wirth

Team Lead Accounts Payable & Receivable

With my extensive knowledge of accounting, built over the past 20 years, I set new standards in every interim project.

GET IN TOUCH WITH US

Would you like to speak with one of our consultants by phone? Simply send us your details and we will get back to you shortly. Please use our contact form or one of the options listed below. We look forward to your message or call!

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