Diploma in Geology (M.Sc.). Lignite exploration in Turkey ( 8 months) assigned by the Federal Institute of Geosciences and Natural Resources, Hannover, Germany.

Doctoral thesis in Geology and Paleontology on Bryozoa (Ph. D. Natural Sciences.).

Member of the scientific board, and curatorial position at the Geological-Paleontological Institute and Museum at Hamburg-University, Germany.

Exploration and feasibility studies in Morocco, assigned by the Federal Institute of Geosciences and Natural Resources (Hannover, Germany).

Editor of the annual "Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg" (Contributions of the Geological - Paleontological Institute of Hamburg University).

Lecturer in Geology and Paleontology and hydrogeological mapping in Cebu City (Philippines), in co-operation with the Water Resources Center of the University of San Carlos. Funded by the German Academic Exchange Service (DAAD). Three months contract for each year.

Supervisor of post-doctoral research fellows (habilitation), and numerous topics for both M.Sc. and Ph.D. thesis of students from Germany, Colombia, Iran, Malaysia, Pakistan, and Philippines, in the fields of geology and paleontology.

Professor in Geology and Paleontology of Hamburg-University.

Geological consultancy for the Chico River dam project at Luzon / Philippines.

Honorary Juror of the competition "Jugend forscht", organised by the Federal Ministry for Education and Research and the "Stern"-magazine (Germany). (Program for the promotion of young researchers)

Partnership between University of Hamburg and Charles University, Prague (Czech Republic). Close co-operation with the Institute of Geology and Paleontology: Colloquia; excursions and exhibitions.

Mapping of the 4000 km2 island of Bohol / Philippines by means of aerial geology and remote sensing; in co-operation with Prof. Dr. F. VOSS (University of Berlin, Germany).

Invitation of the Council of Scientific and Industrial Research (CSIR, India). Lectures in New Dehli, Hyderabad, Madras and at the National Institute of Oceanography (NIO, Goa).

President of the International Bryozoology Association (IBA).

Consultant of the UNESCO / UNDP. Project "Establishment of Institute of Fundamental Studies" in Sri Lanka. (Colombo and Kandy).

Advisor of the "International Institute of "Environmental Studies and Disaster Management" in Dhaka / Bangladesh; member of the board of advisers thereafter.

Consultant of the UNESCO / UNDP project "Establishment of the Institute of Fundamental Studies" in Sri Lanka. (Colombo and Kandy).

Consultant for the "Lignite Deposits of Merit Pila" in Sarawak, Malaysia; assigned by the Federal Institute of Geosciences and Natural Resources (Hannover, Germany).

Head of the research project "Conservation of Reefs, Artificial Reefs, Bryozoan - Reef structures" in the Philippines. Project in close cooperation with PD Dr. J. Scholz and the Marine Biology Section (MBS) of the University of San Carlos; Cebu City / Philippines. Funded by the German Research Foundation (DFG) and the German Corporation for Technical Co-operation (GTZ).

Service Award of the University of San Carlos; Cebu City / Philippines.

Lecturer (3 months) in Geology and Paleontology at the University of Malaya; Institute of Postgraduate Studies and Research (IPSP); Kuala Lumpur, Malaysia. Funded by the German Academic Exchange Service (DAAD).

EU (European Union) Contractor as member of a multidisciplinary team: "Laguna de Bay, Philippines: an ecosystem approach for sustainable management."

Joint research project with Dr. G. GERDES (University of Oldenburg, Marine Station at Wilhelmshaven, Germany) and PD Dr. J. Scholz (Senckenberg Institute) on: "Biodiversity in latitudinal and overregional Comparision: Bryozoa and microbial mats from Japan and New Zealand". Funded by the German Research Foundation (DFG).

Scientific Consultant of the film-project “Ancient Amazon”. Produced by the Austrian TV-Channel (ORF); the French TV-Channel (DocStars) and the German TV-Channel (ZDF).

Geological field studies on the pleistocene landbridge "Beringia" in Alaska (2 months).

Lecturer in Bryozoology at the Nanjing Institute of Geology and Palaeontology, Academia Sinica; China (2 months)

Scientific Consultant of the documentary film "Beringia – Climate Alarm in the Arctic". Produced by the Austrian TV-Channel (ORF) and the German TV-Cannel (NDR).

Scientific Consultant of the Universidade Regional do Cariri ( URCA ) and UNESCO assisted Araripe Geopark; Ceara / Brazil. Supported by DAAD/ German Academic Exchange Service and BMZ / Federal Ministry of Economic Cooperation.

Consultant of Universidade Regional do Cariri (URCA).
Award:  Professor honoris causa.

Consultant of UNESCO Geopark Araripe/ Ceara; Brazil.
Ceara State Government. Secretaria das Cidades Fortaleza; Ceara.

Visiting Professor (DAAD) at Hanoi University of Mining and Geology
and Vietnam Institute of Geoscience and Mineral Resources.

Consultant UNESCO Geopark Araripe/Ceara.
Award :Honorary Citizen of the State of Ceara; Brazil.

Consultant of the documentary film “Araripe; Part I”. Fundacao Cearense de Apolo do Desenvolvimento Cientifico e Tecnologica ( FUNCAP; Ceara).