our company




Convex Ltd. is a Bulgarian CRO, partnering with pharmaceutical, biotechnology and medical device companies. The majority of our clients are international medium- to large-sized CROs. As a full-service Clinical Research Organization, we combine efficient clinical trial management, comprehensive regulatory consulting and know-how to create a customized approach that ensures higher quality services for our international partners. Over the past two decades, Convex has completed over 260 clinical trials in various therapeutic areas. We offer flexible service models ranging from full-service packages to specific functional service options. Convex's currently active clients come from Italy, France, Germany, US, Poland and Israel. Our commitment to quality and continuous innovation has created long-lasting client relationships. Convex provides all in-country’ clinical trial services from feasibility to the final end-of-study. We are capable to meet any study protocol requirements on time and on budget. For the excellent performance to every protocol we provide:


  • Feasibility Manager
  • Contract Negotiation Specialist
  • Medical Writing Specialist
  • Clinical Study Manager
  • Study Subject Recruitment Specialist
  • Well-trained CRAs and CTAs
  • Data Management Specialist
  • Biostatistician
Our services include:
  • Study Feasibility
  • Strategy Consultation
  • Sites Selection
  • Medical Writing
  • Regulatory and Ethics Submissions
  • Site and Investigator Contract Negotiation
  • Investigator Meeting Organization
  • Sites monitoring
  • Project Management
  • Vendor selection and management
  • Data Management
  • Biostatistical Analysis
  • Safety laboratory analysis
  • Bioanalyical laboratory analysis





Convex Clinical Research Center was founded in 2015 to provide therapeutic expertise to the pharmaceutical and biotechnology industries across a range of services. The CRC is dedicated to the conduct of early-phase clinical pharmacology studies in healthy volunteers, and special patient populations over a spectrum of diseases. It is one of the two main business divisions of Convex Ltd. and is operating hand-in-hand with the second division, namely Convex CRO. We believe this provides our partners with the advantage of speedy trial conduct, direct line of communication and lower budget. Besides early-phase clinical studies the CRC allows for the conduct of phase II-IV clinical trials in a variety of therapeutic indications, involving target patient populations. Our expertise:


  • Early phase studies
  • Dose ranging, single/multiple
  • Bioavailability/Bioequivalence
  • Pharmacokinetics
  • Pharmacodynamics
  • Drug/Drug Interaction
  • Drug/Food Interaction
  • Blind dosing/sampling
  • Food effect studies
  • Vaccine studies
  • Food supplement studies
  • Medical devices studies