Archer & Greiner, P.C. | 8,148 followers on LinkedIn. Archer & Greiner is a full-service, regional law firm with a reputation for providing the highest quality, result-driven legal services to corporate and individual clients. One of the largest law firms in the Delaware Valley and among the ten largest in New Jersey, Archer & Greiner serves businesses and individuals throughout the region and in an increasing number of other states and jurisdictions. With a network of regional offices, the firm has more than 175 lawyers practicing in all major legal disciplines.