1. The main investigator on appropriate technologies for water supply and sanitation in developing countries, World Bank Project, 1991.
2. Researcher, application of slow sand filters for water supply, a joint project with the International Reference Centre (IRC) for community water supply (Netherlands), the Rural Water Corporation (Sudan and Gazira Board (Sudan), 1979-1983 (three phases).
3. Sanitation expert and deputy team leader, Evaluation of UNICEF water supply and sanitation project in South Kordufan, Sudan, 1982.
4. Short-term consultant, Evaluation of Sanitation services in Darfur region, UNDP, 1985.
5. Sanitation expert, Management problems of greater Khartoum, a joint project between IDRC- Canada and Institute of Environmental Studies, University of Khartoum, Sudan, 1984.
6. Team leader, pilot-scale study of the liquid waste treatment for Sinnar Sugar Factory, Sudan, 1986.
7. Short-term consultant, Evaluation of the Health Institute in Qatar, WHO assignment 1987.
8. Short-term consultant, Evaluation of Wad El-Mgboul Institute for water Technologies, UNICEF assignment 1987.
9. Sanitation expert, Evaluation and upgrade of water supply and sanitation at Wad Taktook and El-Gedarif hospitals and Hantoub Secondary School, with Promang Consultants for UNHCR, 1988.
10. Water expert, evaluation of the surface water program of the UNICEF in South Kordifan, two assignments: 1985 and 1989.
11. Short-term consultant, Organizer of workshop on the use of ventilated improved pit-latrine, design parameters, UNICEF and Rural Water Corporation, 1990.
12. Short-term consultant, Team leader, Evaluation of water supply in 50 villages in El-Ralhan Irrigation Scheme, 1990.
13. Sanitation expert for the Evaluation of “Services in the Residential Area Kenana Sugar Factory”, 1992 (with Promang Consultants)
14. Team leader for the Evaluation of the “Industrial Waste for wad Medani Industrial Area” , 1992 (at the request of the Government of the Central Region)
15. Development and Execution of a three-months course on “Water and Sanitation” for the UNICEF local field staff, 1984. At the request of UNICEF Sudan office.
16. National Coordinator for two WHO assisted workshops on “Stabilization Ponds in Sudan”, 1987, 1991 at the request of WHO-EMRO.
17. Member of a (three men ) team that organized a national workshop on “slow sand filters in Sudan “-financed by IRC-the Netherlands, 1985
18. Evaluation and upgrading to b Sc, level of environment health department- Jima Health Institute Ethiopia – Consultancy for Ethiopia Government.
19. Member of the team and sanitation expert for the master plan of Darfur university,1992
20. Member of team (formed at the request of the Netherlands embassy in Khartoum ) for the “Evaluation of the curricula of the b Sc. Degree on Environment Studies ” offered by Ahlia University in Omdurman 1992.
21. Member of the UNDP international team for the evaluation of a 18.5 millon us dollars project for evaluation of “ Especial UN 1991 Drought Operation Project for the sudan (SUNDOS 1992”
22. Technical advisor for a WHO financed National Workshop on “ Personal hygiene and behavior “ – Khartoum 1997
23. Member of the that carried special studies on the behalf of The National Rural Corporation and The Government of Netherlands for “ the Management of the Drinking Water Resources and Related Environmental Activities “ in Kassala Town and Nyala Town” 1992-1993( with AWASCO consultants ).
24. Organizer and main resources person ( on behalf of Unicef Office and the National Rural Water Corporation ) of a national workshop on “ Water Supply Sanitation and Health Education” – September,1993 el-Obied , Kordofan
25. Head of a team organized by the German Technical Organization (THW) to evaluate a “ Modified Slow sand Filtration Plant “ (built by a German Contractor ) being a donation For the German Government for the refugees in eastern Sudan “for 60 thousand persons) and to develop a manual for the operation and maintenance of the plant, training of the operators before handing the plant over to the United Nations High Commission of Refugees in Khartoum (UNHCR)(Personal Contract)-February,1995.
26. Environmental study on “ Sugar Industry In Sudan “ July-August ,1995 “- A short Term Consultancy For the WHO-EMRO.
27. Head of the team to rehabilitate the “ Water Supply and drainage” in the faculty of medicine- University of Khartoum-1996>
28. Member of the steering committee of UESCO chair for water resources established in faculty of Engineering of Omdurman University, during 1995.
29. Member of a team formed by Kordofan State Government to evaluate the “ Water Supply of El-Obied Town” in North Kordofan, 1996
30. Chairman of a team to work out the syllabi for the Faculty of public & Environmental Studies to be established in the university of El-Gadarif-July 1996.
31. Took part in drafting the syllabuses for the “ Planned Faculty of Chemical Technology “ in university of Juba,1996.
32. The appointed (by WHO) National Consultant for National Workshop on the “Environmental Health Impact Assessment of Development Projects”- December ,1995.
33. Shouldered the responsibility for “ Upgrading Of School Of Hygiene : from an institute that was offering a three-years post secondary Diploma (for more than 50 years )(1933-1980) to the b Sc. Degree Level, as confirmed by the attachment letter of The Ministry of Higher Education in 1987.
34. One of the international experts who reviewed The WHO-EMRO Technical Production N-10 on “ Waste Stabilization Ponds” , Published By WHO-EMRO,1987
35. One of the eight international experts who , on the Invitation of EMRO-WHO participated in the “ International Expert Group Meeting in Waste Stabilization Ponds “ Organized by WHO-EMRO-Lahore,Pakistan,1987.
36. One of the seven experts who reviewed the CEHA.S (Centre For Environmental Health Activities ) document No. TLM-6 :”Guidelines on Technologies for Water Supply Systems in small communities’ published by WHO-EMRO/CEHA,1993
37. One of the seven international Experts who reviewed CEHA’S (Centre of Environmental Health Activities ) document no TLC-5:” Guidelines on Technologies for Water Supplies Systems in small communities “ WHO-EMRO/CEHA,Amman,1993.
38. Team leader for the evaluation of “ Groundwater Pollution in Khartoum”-1997.
39. One of the two designers for an activated sludge unit to treat waste water for a diary factory (KAPO) in Khartoum at the rate of 50 meters cube per day (operating now ), 1996
40. At the request of The Khartoum Ministry of Agriculture and Animal resources undertook with a colleague, the contract for the assessment of present waste treatment facilities in Omdurman slaughter house and developed a design to rectify the situation (1997)- three Volume Report (in Arabic).
41. Commissioned by AMIPHARMA pharmaceutical laboratories to develop a pretreatment unit for water treatment to meet pharmaceutical requirements and to be there consultant in this respect for the year 1998.
42. Member of a team to evaluate UNICEF inputs in some rural areas of Khartoum state since, 1997.
43. Appointed member of the ‘ Managing Board of Khartoum Sewerage and Storm Drainage Company “ of The Khartoum state Ministry of Housing and Engineering as from April 1996 until 2008
44. Appointed consultant to the construction and Environmental Laboratories Center- Khartoum state ministry of Housing and Engineering Affairs – Khartoum as ( from 1996- to 2007) .
45. Member of teams that conducted the following EIA studies on behalf of :

1- Greater Nile petroleum operating company (GNPOC), EIA for the petroleum export pipeline (Heglig-Port Sudan)-1998-team leader.

2-Greater Nile Petroleum Operating Company (GNPOC),EIA for field production facilities (FPFs) in Thoma south, El Nar, Unity,Eltor and the Central Production facility (CPF) in Heglig (1999).

3- Greater Nile Petroleum Operating Company (GNPOC), EIA for Field Production facilities in Monga And Bamboo.

4- Greater Nile Petroleum Operating Company (GNPOC),EIA for Balila Field Production Facilities-2000

5- Greater Nile petroleum Operating Company (GNPOC), EIA for Neem field production facility,2004.

6- Greater Nile Petroleum Operating Company (GNPOC),EIA for Bashyer two Oil Terminal-2004.

7- Greater Nile Petroleum Operating Company (GNPOC),EIA for Differa Field Production facility,2004.

8- Petrodar, EIA for field Production facilities in Aderal and BOULOCH,and Central production facility at El Gabalein,2004.

9- White Nile Petroleum Operating Company (WNPOC),EIA for Oil exploration in block 5B,2006

10- National Electricity Corporation,EIA for Garri Power Plant-2005.

11. National Electricity Corporation, EIA for Mohamoud Sharief Power Station- Khartoum North Power Station (Extension) – 2005.

12. Ministry of Mining, EIA for a factory to produce chrome in Eldamazin 2004.

13. Mamoun Elberier, EIA for a factory to produce detergents – Khartoum North industrial area, (2004).

14. Rida Gold Mining Company, EIA for gold mining in Abeedia, 2005.

15. Omdurman Company for soap and detergents, EIA for a factory to produce detergents, 2006.

16. EIA for water pipeline to convey water from Arbeedia, to Ariab Company Minig Site at Hassai Mining Site – 2013.

17. Dubai International Mining Company – EIA for their Mining Site in North Korofan – 2014.

46. Evaluation of the ” Environmental Impact of the Factory (in Sinkat) for the Protective Coating” of the pipes of the Petroleum Exporting Pipeline, 1998.

47. Evaluation of the “Solid Waste Management for El-Gedarif Town” and organizing a workshop to the same effect, 1998.

48. The Chairman of the Scientific Committee of a workshop on Environmental pollution in Khartoum State that was organized by the Sudanese Engineering Society, 1998.