On his return he went to Sydney, and did some survey work for the New South Wales Government into whose service he permanently entered.

He is now a Lands Inspector on the South Coast.
After his experiences as second with Ernest Giles, Tietkins took charge, in 1889, of the Central Australian Exploring Expedition.

He left Alice Springs on the overland line on the 14th of March to examine the hitherto unknown country to the north and west of Lake Amadeus.

Late in the month of May he discovered and named the Kintore Range, to the north-west of Lake Macdonald, and ascended one of the elevations, Mount Leisler.

During the beginning of the next month he practically completed the circuit of Lake Macdonald and discovered the Bonython Ranges to the south-east.