Angus worked for Alan Baxter and Associates (London) and Kohn Pedersen Fox (London) from 2006 until 2010. His projects included the Public Realm Strategy for Greater London, and the Covent Garden Master Plan. He established LLAMA Urban Design with Mariana Leguia in 2010.
As part of LLAMA, Angus has led major urban projects for various entities including Peruvian ministries and local governments, on projects including the pedestrianization of the historic centre of Lima. Working with the World Bank, Angus has led two transit-oriented development master plans: one in Quito, Ecuador, and another in Lima, Peru. Also with the World Bank, he has recently finished tactical urban design guidelines to facilitate social distancing in Peruvian cities during the COVID-19 pandemic.