BRANDI lawyers.

Dr. Annette Mussinghoff-Siemens

Lawyer and Notary in and for Bielefeld
Certified Specialized Attorney in Construction and Architectural Law
Certified Specialized Attorney in Public Procurement Law

Location Bielefeld
T +49 521 96535 - 860
F +49 521 96535 - 117
Foreign language: English


About me

  • Born in 1964
  • Legal studies at the Universities of Bochum and Münster
  • First Exam ("1. Staatsexamen") in 1992
  • Legal clerkship ("Refrendariat") at the Münster District Court
  • Employee at a Westphalian law firm and notary's office from 1995 to 1997
  • Second (Bar) Exam ("2. Staatsexamen") in 1995
  • Bar admission in 1997
  • Doctor of Laws (Dr. jur.) 1999
  • Certified Specialized Attorney in Construction and Architectural Law since 2007
  • Appointment as notary in 2015
  • Certified Specialized Attorney in Public Procurement Law since 2016



  • Procurement law compliance

Private construction law and regulations for architects

Private construction law

  • Project-based legal consulting
  • Contract design and review (standard price agreements, lump sum price agreements, GMP models, general contractor agreements, general take-over agreements, developer agreements)
  • Review and handling of additions
  • Preparation of letter templates in accordance with the VOB (German Construction Contract Procedures)
  • Enforcement of wage claims
  • Enforcement of/defense against warranty claims
  • Risk estimates and assessments including recommended actions
  • Support during extra-judicial disputes and negotiations
  • Conduction of proceedings

Regulations for architects and engineers

  • Contract design and review (architect contracts, engineer contracts, general planning contracts, project control agreements)
  • Clarification of the scope of services owed by the architect or engineer
  • Consulting during the preparation of the final invoice for fees
  • Enforcement of fee claims
  • Consulting and representation with regard to disputes under liability law

Plant construction

  • Contract design and review of plant construction agree-ments
  • Enforcement of remuneration claims
  • Enforcement of and defense against warranty claims

Law governing construction contract award

  • Drafting and preparation of the award and contract doc-uments for the award of construction and planning contracts
  • Preparation of announcements
  • Answering questions of bidders
  • Creation of an assessment matrix
  • Award procedure documentation
  • Representation in contract award review proceedings
  • Preparation of objections to proceedings, support of negotiations with bidders and clarification of offers

Real estate law

  • Support and legal structuring in the context of project development
  • Review and negotiation of real estate purchase agreements
  • Project development contracts
  • Administration and (facility) management contracts
  • Enforcement of/defense against warranty claims

Public procurement law

  • Consulting of public clients with regard to the selection and drafting, preparation, execution and documentation of award procedures
  • Consulting of bidders with regard to their participation in award procedures
  • Representation of bidders and public clients in reexamination proceedings before procurement chambers and senates
  • Legal opinion on procurement law matters
  • Procurement of IT services



  • Effektiver Lohnausgleich bei Arbeitszeitverkürzungen durch tarifliche Ausgleichszulagen, jur. Diss., Münster 1999


  • Deutlich verbesserter Bieterschutz durch neues Vergaberecht, Immobilien Intern, Beilage Nr. 22/2000


  • Deutscher Anwaltsverein
  • Arbeitsgemeinschaft Baurecht im Deutschen Anwaltverein
  • Deutsche Gesellschaft für Baurecht e.V.
  • Freundeskreis Rechtswissenschaft der Westfälische-Wilhelms-Universität, Münster