Genetic engineering is undergoing a revolution, where next-generation technologies for DNA and host manipulation are enabling larger and more ambitious projects in biotechnology. Automated DNA synthesis has advanced to where it is routine to order sequences >100,000bp where every base is user-specified, the turnaround time is several weeks, and the cost is rapidly declining. Recently, this facilitated the synthesis of a complete 1 Mbp genome of a bacterium and its transfer into a new host, resulting in a living cell. However, while whole genomes can be constructed, the ability to design such systems is lagging. The focus of my lab is to develop new experimental and theoretical methods to push the scale of genetic engineering, with the ultimate objective of genome design. This will impact the engineering of biology for a broad range of applications, including agriculture, materials, chemicals, and medicine.