Cesar Cornejo's work explores the relationship between architecture and art, to create sculptures, site-specific installations, drawings, photos etc. that portray opposite and sometimes disparate aspects of society, recomposing them in new settings that challenge our perception of reality.

He has been greatly influenced by his experience living and working in Japan, London, New York and Peru. Each of these cultures has marked his practice in a particular way. In Japan he was influenced by its deep spirituality and the ritualistic presence in everyday's life, by the sense of community embedded in every aspect of society and by the rigorous sense for the material, technique and craftsmanship. In the United Kingdom, by conceptual approaches in art making, by the communicational possibilities of the visual language in particular advertising, and by the experience of working in projects that encouraged open approaches to education and community as art. In New York, by the project based approaches to art, by business models applied to art practice, and by the concept of sustainability as a core art concept and in Peru by the socio-political context, the contrasting socio-cultural landscapes, and by the rich archaeological heritage.
The development of an expression that combines these different elements, is an ongoing process placed at the core of his studio practice. While addressing specific problems that may refer to his native Peru, they are also open to multiple readings and interpretations that make them accessible to broader audiences in international contexts.
Since 2007 he has been working on the project Puno Museum of Contemporary Art, a project that redefines the concept of museum placing the community at its center.