Orr-Ewing began his career as an investment manager for the Shell Pension Fund in London after qualifying as a Certified Accountant.
He has over 35 years experience in both the oil and mining industries and has been a director of UK and Canadian oil companies and Irish and Canadian mining companies.
Orr-Ewing also currently acts as an adviser to a fund management company on its natural resources portfolios.
He was actively involved in the oil industry from 1971 through to 1987 working with numerous companies in the North Sea, Libya, Nigeria and Algeria.
Orr-Ewing joins the company at a time when its budget airline is expected to commence flights by the end of this month provided they get a licence from aviation authorities in the country.
It is said that there have been problems with aircrafts that the company wanted to use, as they were not approved by the Civil Aviation Authority of Zimbabwe.
Plans are said to be underway to secure planes or at least have the ones available approved by CAAZ.
LonZim is building a portfolio of investments primarily in Zimbabwe, which may benefit from any radical future improvement of the Zimbabwean economy over the longer term.