Original: With the completion of the Tractatus, Wittgenstein believed he had solved all the problems of philosophy and he abandoned his studies, working as a schoolteacher, a gardener at a monastery, and as an architect, along with Paul Engelmann, on his sister's new house in Vienna.
Simplified: After abandoning his work as a school teacher, Wittgenstein worked as a gardener's assistant in a monastery near Vienna and then he worked with the architect, Paul Engelmann.