The lawyers of Newman, McIntosh & Hennessey have represented plaintiffs in medical malpractice, product liability and personal injury suits. They have also represented criminal defendants as well as commercial litigants. The firm has also represented corporate clients in contracts, administrative hearings, and other related disputes.

The firm's diverse client base has included brokers, musicians, real estate agents, etc., in a broad range of civil and criminal litigation. Even the plaintiffs' cases are unique for many of the firms' clients have been lawyers, physicians, nurses, dentists and/or other professionals.