• 1,400 Staff Worldwide
    Global reach with local knowledge in 50+ countries
  • 19 years old and privately owned
    Join the Tribe
  • 5% staff turnover company-wide
    Guaranteed continuity of study teams, loyalty and accountability
  • 95% of psi studies complete on time
    Saving you money and time to market
PSI is a leading full-service global Contract Research Organization whose key strength is predictable patient enrollment across multiple therapeutic areas.
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Learn why PSI will deliver your ID study on time
PSI is known in the industry as a CRO focused on on-time project delivery. This is achieved through investing substantial effort and MD resources into performing quality feasibility assessments that provide an accurate predictor of study timelines.
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Week 42, 2014

  • PSI initiated enrollment in a phase III study of a novel biological agent in patients with metastatic colorectal cancer.
  • PSI met an interim enrollment milestone of 500 randomized patients in a phase III study of a novel immunological agent in breast cancer.
  • PSI reached an interim enrollment target of 750 randomized patients in a phase IV study of a novel antiarrhythmic for the treatment of atrial fibrillation.
  • PSI met an interim enrollment objective of 50 randomized patients in a phase II study of a novel biological agent for the treatment of Crohn’s disease.
  • PSI completed the active treatment period in a phase III study of a novel biological agent in patients with multiple myeloma.
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Partnerships in Clinical Trials 2014
November 5-6, 2014, Barcelona, Spain
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“Successful completion of patient recruitment in just over 12 months is a credit to the clinical team which has worked tirelessly to execute this trial within the tight timeline and budget”
Chief Scientific Officer, Australia February 2013
“I’m always impressed with how PSI employees conduct themselves and I frequently hear them say …”that is not a problem” no matter how big or small the request may be.”
Director Clinical Operations US January 2013
"PSI team, we got [drug] approved in US! This would not have been possible without all your efforts and your help. I wanted to thank all of you for this!”
Clinical Project Manager Austria June 2013
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ZUG, Switzerland, October 3, 2014 - PSI CRO, a full-service contract research organization will be in attendance at the upcoming Outsourcing in Clinical Trials New England on October 7th & 8th. The event is being held at the Westin Boston Waterfront Hotel and will be attended by representatives of PSI operational management … Read More »

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