Sebastian Siesenop

Sebastian Siesenop

  • Lawyer
  • Specialist Lawyer for Trade and Company Law
  • Specialist Lawyer for Tax Law
  • Financial consultant (FH)


Office Hanover
T +49 511 899379 - 16
F +49 511 899379 - 77
Languages: English, French, German

About me

  • Born in 1985
  • Diplom-Finanzwirt (FH) (Graduate in Fiscal affairs) study course at Niedersächsische Fachhochschule für Verwaltung und Rechtspflege (Technical University of Lower Saxony for Administration and Administration of Justice) - Faculty of Tax Administration 2004 - 2007
  • Studies of law at the Leibniz University Hanover
  • Scholarship by Christian-Kuhlemann Foundation
  • First state bar exam in 2012
  • Position in senior level public service, Fiscal Administration of Lower Saxony, 2007 -2012
  • Legal clerkship in the district of the Higher Regional Court Celle
  • Second state bar exam in 2014
  • Bar admission and entry into the firm in 2014
  • Specialist Lawyer for Trade and Company Law since 2018
  • Specialist Lawyer for Tax Law since 2018



 Tax law
  • Preparation of and support during audits
  • Actions before the fiscal court, the Federal Fiscal Court and the European Court of Justice
  • Conduction of objection proceedings with regard to all tax types
  • Consulting with regard to tax planing for all tax types
  • Final costing
  • Cash auditing
  • Representation in liability proceedings
  • Tax law compliance
  • Consulting with regard to voluntary reporting of tax evasion
  • Preparation of voluntary reports of tax evasion including the review and assessment of bank receipts
Corporate law


  • Selection of the legal form (corporate law and tax law)
  • Drafting of the partnership agreement, further agreements between the partners


  • Transformation law, transformation tax law
  • Consolidation, split, restructuring, contribution, merger

Disputes within the company

  • Disputes between the partners, with members of bodies and with the company

Corporate tax law

  • Company related corporate and income tax law
  • Inheritance and gift tax law
  • Conversion tax law



  • Deutsche Steuerjuristische Gesellschaft e.V.