This thesis examined trust in the contextually specific domain of Human Supervisory Control, (HSC). Study one, established that control engineers conceptualise trust according to the context within which they are working and give more emphasis to making trust observable. Study two, identified important common contextually specific constructs of trust relevant to HSC domains and showed that differences in levels of trust existed across three bespoke groups of elements. Study three, confirmed construct validity in the three most important trust factors from study two and established a link between type of system interface, team location, level of trust and team performance. Study four, showed that these same constructs were important in developing trust in team interaction and a matrix of trust factors was validated based on emotive, cognitive and behavioural dimensions. It is argued that trust is a resultant perceptual state that is reinforced by varying the critical factors within a socio-technical systems and should not be considered out of context. It is shown that to ensure a trusting status, effort is required to maintain continuous visual and tangible feedback between human-human and human-system interfaces in an attempt to reinforce a perceived desired common goal. By adapting the Perceptual Control Theory framework, a practical model of trust has been developed that provides a relevant measuring tool that may be used to enhance trust in HSC and other applied engineering domains.