Matthias Beltzig has a training as Steuerfachangestellte (tax assistant) with subsequent study of Economics in Wiesbaden. He worked in the field of auditing with one of the largest auditing companies of the world with subsequent work as Managing Director of a tax consultancy company.

Matthias Beltzig is active for medium-sized enterprises as Senior Auditor with annual audits.

Included in the focus of his advisory activities is economic advice in the areas of risk and quality management as well as tax advice in the areas of audit, company audit and tax criminal litigation. An additional specialisation is tax advice with non-profit organisations.