In Hermannsburg Johannsen erected buildings, stockyards and performed general repairs. He was often assisted by and taught Aboriginal men building skills.
In 1911 the family left the mission and moved to Deep Well Station; where Gertrude (Trudy) Ottilie Johannsen (28 August 1912) and then Kurt Gerhardt Johannsen (11 January 1915) were born.[1]
Johannsen sometime left the running of Deep Well to contractors and took building contracts elsewhere, this included sinking wells, building the police buildings at Alice Well and Arltunga (alongside Bill Liddle) and working on the Stuart Town Gaol.[2]
Johannsen also served as a guide to Walter Baldwin Spencer and Leonard Keith Ward during their 1923 visit and, once again hosted Ward and Vilhjalmur Stefansson. Stefansson wanted to compare the arid desert of Central Australia with the Arctic.[2]
Following the sudden death of Carl Strehlow in 1922 Johannsen returned to Hermannsburg to work as the station manager before again returning to Deep Well in 1924. While here Johannsen started a tanning industry and encouraged gardening again.[2] Mona Dora Johannsen (27 October 1923) was born at the Mission.
Central Australia was in the midst of a severe drought and, Johannsen was experiencing poor health and had contracted polio myelitis, so after seeking treatment in Adelaide (where he had to say for 7 months) the family gave up their lease and moved to Alice Springs in 1928.[1][2] Johannsen's trip to Adelaide was enabled by Sam Irvine, a mail contractor, who made up a canopy bed for him on his truck and looked after him until they were met at the Oodnadatta railhead by Australian Inland Mission sisters who assisted him on the train.[3] However, in these years two additional children were born; Randle Werner Johannsen (10 August 1925) and Myrtle Edna Johannsen (22 November 1926).[1]
In Alice Springs Johannsen built a family house on Todd Street; what is now the site of the National Australia Bank (this was commandeered by the army for nursing sisters' quarters during World War II). Shortly after this Johannsen pioneered the first mail truck to Arltunga, held the government contract for sanitary and garbage services (with his son Kurt), was involved in gold mining at Winnecke and mica mining in the Stranways Ranges; where the family lived during the war.[2]
Following the end of the war the family returned to Alice Springs and Johannsen retired from active bush work;[2] a severe accident at Winnecke strongly contributed to his decision to retire.[4]
