He was born in 1944 in Southern Rhodesia and served with the Rhodesian Army and then the Zimbabwe Defence Forces before founding and leading companies such as the Dyck Advisory Group (DAG) which provided specialist security services including anti-poaching, demining and counterinsurgency.

Dyck remained and helped with the foundation of Zimbabwe's parachute battalion from former RAR and Selous Scouts soldiers as well as former ZIPRA and ZANLA guerrillas.

[7][8] During this time he forged a close working relationship with the Zimbabwean Minister of Defence (later President) Emmerson Mnangagwa and was awarded the Silver Cross of Zimbabwe (SCZ).

[5] Utilising his contacts with Mnangagwa, in 2008 he set up a company called MineTech where a leaked diplomatic cable described them as "business partners".

[12] In 2021, aged 77, he was hired by the Mozambique police to provide military assistance against Islamic terrorists, fighting on the front line in the Battle of Palma.