Denis's practice centers on local government operations, including public employment law, zoning and planning, school law, including IDEA matters, municipal utility law, local public contracts and school contracts, and real estate tax law. He is the attorney for the Springfield Township Planning Board, Springfield Township Zoning Board, New Hanover Land Development Board and New Hanover Board of Education. He is also an approved attorney for the Division of Youth and Family Services, Adoption Resource Center, and has an extensive adoption practice.

A graduate of Christian Brothers Academy in Lincroft, NJ, Denis received his B.A. in Economics and Modern Language from the College of the Holy Cross, studied economics at the University of Madrid, Spain, and received his J.D. from Seton Hall Law School. He served as an Assistant Deputy Public Defender for the State of NJ before forming Hulse & Germano. in 1981. Denis is fluent in Spanish.

Denis is a member of the Burlington County Bar Association, Municipal Law Committee, the NJ State Bar Association and the Medford Lakes Colony Club.