Managing partner of Haas & Najarian for 52 years, Haas has tried and supervised government contract disputes in virtually every forum in the country, including contract appeals boards, the U.S. Court of Federal Claims, the U.S. Government ability Office, and the U.S. Supreme Court. He provides business advice to clients across a wide range of industries, including real estate, manufacturing, mining, technology, and an array of service businesses.

With more than four decades of experience, Nicholas has a diverse real estate practice representing owners and developers in the acquisition, disposition, leasing, financing, construction, and management of all types of commercial properties. He has developed particular expertise in the hospitality industry, where he negotiates third-party and "brand" hotel management and hotel franchise agreements. He also has considerable experience in negotiating, documenting, restructuring, and enforcing commercial leases.