Castle is an accomplished full-services certification and licensure testing company. We allow your stakeholders to excel in their profession through the development of competency-based testing, training, and high-stakes certification programs.
With an expert team of testing and instructional design professionals, Castle understands what it takes to successfully launch and maintain a quality credentialing program. Backed by 28 years of experience in the science of psychometrics and training development, we invite you to partner with a trusted team that is dedicated to your success and will deliver a seamless experience for your program.


  • 1.919.572.6880
  • 6001 Hospitality Court, Suite 100
    Morrisville, NC 27560

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