Our offices will be closed for the holidays starting December 22nd, 2018. We reopen January 2nd, 2019.

The staff at SIGMA wish you a very happy holiday season and best wishes throughout the new year!

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Assessment Systems

P.O. Box 610757
Port Huron, MI
USA 48061-0757

Phone: 1.800.265.1285

Fax: 1.800.361.9411

In Canada:

Psychologists Press

P.O. Box 3292, Station B
London, ON
Canada N6A 4K3

Phone: 1.800.401.4480

Fax: 1.800.361.9411