NCSL International is a member based and volunteer driven Professional Trade Organization. NCSL International provides the best opportunities for the world's measurement science professionals to network and exchange information, to promote measurement education and skill development and to develop a means to resolve measurement challenges. NCSL International membership is open to any organization or individual with an interest in the science of measurement and its application in research, development, education, or commerce.

NCSL International was formed in 1961 (as NCSL*) to promote cooperative efforts for solving the common problems faced by measurement laboratories. Today, NCSL International has over 1500 Member Organizations from academic, scientific, industrial, commercial and government facilities around the world. This wide representation of experience provides Members a rich opportunity to exchange ideas, techniques, and innovations with others engaged in measurement science.

NCSL International is a nonprofit organization, whose membership is open to any organization with an interest in the science of measurement and its application in research, development, education, or commerce.