McDonnell provides unique and quality engineering services in the following areas of activity:

1. Contract Mining: Earth-moving works related to such specialized works as waste mining, drilling and blasting of oxidized and hard pan sulphide ore, infrastructural development, supply of mining logistics, etc

2. General road construction works 3. Dam construction for farming, industrial and domestic water supply, borehole drilling, development and mechanization for integrated water supply and sewerage systems, general pipe laying for liquid and gas conveyance

4. Land clearing and development for projects

5. Plant installation, machinery maintenance and repairs. 1990, McDonnell Contract Mining Ltd has the following additional identity marks:- Incorporation Certificate No.: C-38,967 (1990) Registration with Ministry of Works & Housing: Categories D.1 & K.1.

With increase in demand on McDonnell Contract Mining Limited for haulage and transportation services, McDonnell Contract Mining Limited hived off the plant hire and specialized transportation of plant and equipment services unit to a fully-fledged company, TMS Zebulun Ghana which was incorporated in May 2000. TMS operates independently of McDonnell Contract Mining Limited