Educational technology is a field of science engaged in study and practice in facilitating learning, managing resources and processes, and improving performance. The profession and scope of work for educational technology graduates are wide and varied. Still, many educational technology graduates work in the education sector, especially as vocational high school teachers. Regarding this, of course, there is a lot of experience and knowledge related to educational technology that must be applied to the scope of learning. So, studies and research were designed regarding applying educational technology science to the teaching profession in vocational high schools. The analysis was carried out using a descriptive qualitative approach by collecting data through interviews with several graduates of educational technology who work as teachers in vocational high schools. Interviews were conducted to determine the challenges of educational technology graduates, the application of educational technology science, and the code of ethics in schools. The results obtained are that educational technology graduates have a strong foundation and study in managing and facilitating learning so that teachers of educational technology graduates can easily apply knowledge and a code of ethics within the scope of vocational high schools. It can be concluded that the application of educational technology science to the teaching profession in vocational high schools is well and optimally applied regarding the application of knowledge, the applicable code of ethics, and the constraints and challenges faced.