Described as "a small-town team playing in the big leagues," Constantine & Lockwood has major clients around the world and has been featured in the ACM interactions magazine (March/April 2002). Their innovative design work with Siemens AG took first place in the 2001 Performance-Centered Design Competition. The company extends its capabilities to meet client needs through a network of consulting associates and close ties with leading independent consultants.

Domestic clients have included such leading firms as:

Anderson Consulting, Cadence, Canon Information Systems, Digital Equipment Corporation, Doubleday Select, Forum Financial, Glaxo, iMind education systems, International Flavors and Fragrances, Lockheed KAPL, McKesson, NYNEX Science and Technology, State of Rhode Island, State Street Bank and Trust, Universal Learning, Ventritex, Visible Systems

International clients have included:

Australia: Australian Computer Society, Bankers Trust, Dow Jones Telerate, JNA Telecommunications, Westpac Bank, Wilcom; Brazil: Instituto Brasileiro de Pesquisa em Informatica; Canada: AccuMap, Nortel Networks; Denmark: Niveau Management; Germany: CAP Debis, SAP, Siemens AG; Italy: Technology Transfer S.r.l.; Russia: Anchor Personnel Consulting; Sweden: BoldSoft, Ericsson Telecom, Objectory AB