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Holger Grefer is a seasoned professional with 25+ years of experience in business computing, financial accounting, and consulting. He holds a Master of Science in Business Computing from HTW Berlin - University of Applied Sciences and has worked in various roles, including Chief Financial Manager, Financial Controller, and Assistant Tax Consultant.

Experience

  • wi | bit
    • Grünheide, Berlin Area, Germany
    • self-employed, consulting business IT and accounting
      • Mar 2013 - Present
      • Grünheide, Berlin Area, Germany

      Services and consultation, business IT and accounting

  • Acc.o.d. - Accounting on demand
    • Grünheide, Berlin Area, Germany
    • self-employed accountant
      • Jul 2005 - Dec 2009
      • Grünheide, Berlin Area, Germany

      In addition to accounting and annual accounting operations: Development and implementation of a JavaScript application to administer customer invoices, according to requirements based on Excel tables, integrated via ASP classic on IIS server. Approach of developing same application with extended ...

    • Chief Accounting Manager
      • May 2005 - Jun 2005
      • Berlin, Germany

      Short-term employment to carry out the following tasks: - reorganization of the accounting department, - staff training, - coordination of work processes, - installation of the existing Filemaker database with partially automated invoicing

    • Chief Financial Manager
      • Jan 2004 - Apr 2005

      Management of a project to improve data quality primarily in the specialist departments, with the success of faster processing and high data security for accounting. Further development and implementation of interfaces for - a plausibility check of the data in the respective database systems of the departments, - an automated printing of invoices, - the import of relevant data from various databases into the accounting system, - automatically making customer payment information available for the specialist department, - reports and analyses, including dashboard for management. As of 01.01.2005 entrusted with the liquidation of the GmbH, which ceased its business activities on 31.12.2004. Translated with www.DeepL.com/Translator (free version)

    • Consultant
      • Sep 2003 - Dec 2003

      Consultancy for both, CIEE e. V. and CIEE GmbH, Berlin Support in questions of tax, accounting and labour law in cooperation with tax advisor and lawyer, in regard to the transition of the company's legal form from a non-profit association to a GmbH (with American management), transfering business in accordance with § 613a BGB. Development of a prototype for the optimization of processes in the specialist department, with the aim of achieving higher data quality in accounting.

    • Financial Controller
      • Dec 1998 - Sep 2003
      • Berlin, Germany

      Initially, conversion of the accounting system to DATEV with the establishment of cost centres, later participation in the development of an internationally oriented accounting system and the group-wide introduction of Sun Microsystems. Current accounting work, annual financial statements. Traine...

    • Accounting
    • 1 - 100 Employee
    • Commercial Certified Accountant
      • Mar 1994 - Nov 1998
      • Frankfurt/Main, Germany
  • Seiko Instruments GmbH
    • Frankfurt/Main, Germany
    • Accountant
      • Oct 1989 - Mar 1992
      • Frankfurt/Main, Germany
  • Steuerbüro Wittrock
    • Hamm (Westf.), Germany
    • Assistant tax consultant (Vocational training)
      • Aug 1984 - Jul 1987
      • Hamm (Westf.), Germany

Education

  • 2012 - 2016
    HTW Berlin - University of Applied Sciences
  • 2009 - 2012
    HTW Berlin - University of Applied Sciences
  • 1993 - 1994
    IHK Frankfurt am Main
  • 1984 - 1987
    Tax Consultant Wittrock, Hamm

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