With a focus on creating exceptional quality and lasting value, Renaissance Development Corp( Renaissance) continues to be one of Atlanta’ s most sought-after builders. Warren Sirzyk, President, has been in business since the early 1980s, when he originally came to Atlanta from Montreal, Canada.“ With a background in highrise construction and commercial development, I started by building high-rise condos for a Canadian client in Canada. Having built a few projects for them, I was asked to build one of Atlanta’ s first midrise concrete condos.