Who We Are

Sierra | CRO

Together, transforming vision research

Sierra Clinical

At Sierra, our clients come first. We are a niche contract research organization (CRO) with over 300 years of combined therapeutic experience, specializing in and transforming vision research.


Our dedicated team of experts are efficient, meticulous and devoted to our clients and study sites to ensure the data captured is precise and the trials are successful.


We have your back every step of the way, working as an extended part of your team. And the best part? We love what we do.

Sierra Clinical

Our mission

Changing lives through the acceleration and transformation of vision research.


Our vision

To be the partner of choice offering the most reliable, precise and efficient CRO services, through the guidance, advancement and transformation of vision research.


What we stand for

  • We put our clients first.

    Everything we do, we do with our clients best interest at the forefront.

  • We follow "The HAD-ly Rule"

    aka High Attention to Detail. We are meticulous and ensure every "i" is dotted and every "T" is crossed in all that we do.

  • We are part of your team.

    Our team of experts work as an extension of your team, and always keep you in the loop. We take the time to build strong relationships with all clients and site staff.

  • We protect data privacy and security.

    We are stewards of your data and we take it very seriously. We ensure adequate safeguards are in place and data protection principles are followed.

  • We have your back.

    We are a calming force in challenging situations, carry your burdens and guide you every step of the way.