Welcome to

80+ professionals working at VALOS hold a University degree in Mathematics, Statistics, Genomic Statistics, or Informatics and have 10+ years of experience in clinical trials. 4 statisticians hold a Ph.D. in Statistics.

The team is headed by Dr. Dmitri Petratchenko, a pragmatic mathematician who has more than 20 years of experience as Senior Statistical Programmer and Clinical SAS® programmer, PHUSE member since 2007. He stays involved throughout the project, ensuring strong science and consistent quality.

VALOS’ experienced statisticians and skilled SAS® Statistical programmers can deliver better quality and on-time completion of projects, helping you to drive your clinical trial’s success.

VALOS Core Team

Dmitri Petratchenko


The team is headed by  Dmitri Petratchenko, VALOS CEO. He is a pragmatic mathematician with 20+ years of experience in clinical trials. CEO stays involved throughout the project, ensuring strong science and consistent quality.

Andrea Parodi

Head of Biostatistics

The Biostatistics team is headed by Andrea Parodi.  a statistician with 10+ years of experience in biostatistics, pharmacoepidemiology, Real World Evidence studies, and DataBases analyses.

Mikhaela Miliotti

Head of Business Development

The Business Development team is headed by Mikhaela Miliotti. An experienced  business development professional  with 10+ years of experience.  

Headquartered in Genoa, we are Italy’s foremost organization in the field of biostatistics and statistical programming services for Phase I to IV Clinical Trials for drug and device development studies. With professional interests concentrated on offering operational excellence with our services to the Pharmaceutical industry. Our areas of focus lie in providing high quality research to bolster our clients’ clinical trials and turning them into resounding successes.


Valos works closely with small and mid-sized pharmaceutical and biotech companies within a highly regulated pharmaceutical environment and manages their entire biostatistics part of clinical trial processes with a hands-on approach, concurrently making its expertise available to some of the world’s biggest pharmaceutical corporations each time the opportunity arises.


Our many strengths include: providing clinical data with utmost accuracy, always delivering within the specified timelines, services tailored to suit specific budgets, having a customer-centric approach, enforcing an independent quality control process and enabling our staff to undergo comprehensive training and development within the ever changing environment.


Led by pragmatic mathematician Dr. Dmitri Petratchenko, Professor at the University of Genoa teaching SAS programming, a PHUSE member since 2007 and with over 20 years of experience as a Senior Statistical Programmer and Clinical SAS programmer. Valos’s experienced clinical research professionals comprising statisticians with doctoral pedigree and seasoned SAS statistical programmers overseeing everything from inception to quality assurance post-trial.


Valos’ extensive experience in statistical analysis modeling and training within the industry in 21 CFR Part 11 or GCP and our proven record of meeting industry standards laid out by the Clinical Data Interchange Standards Consortium (CDISC), helps clients achieve optimal quality in their clinical trials and ensure on-time project completion and excellent quality work.


Our statistical analysis plans comprising different methodologies such asMMRM, multiple imputation, multiple testing strategies and multiple failure time models, have drawn praise from our clientele spread across various parts of Europe and the United States of America for their efficacy and ability to influence positive outcome.


With a powerhouse team in place, in-depth knowledge of the industry and intensive experience, Valos aims to help its pharma clients set new benchmarks in clinical trials and scale newer heights.


Dmitri Petratchenko

Dmitri Petratchenko has been a Statistician and Statistical Programmer for over 20 years, He owns and promotes Valos S.R.L since 2002, where as CEO he spearheads the Statistical Programming division besides managing a team of Statisticians and Programmers engaged in various projects.

Dmitri holds three Masters Degrees, in Applied Mathematics, Theoretical Mechanics and Economical Mathematics, all from Belarus State University. This is in addition to Masters Degrees in Medical Statistics and Genomics from Pavia University, Italy. He is also a successful programmer and statistician in SAS. He is vastly experienced in different clinical trial submissions to the FDA, EMEA and Japan and has participated in MHRA GCP Inspections, besides being a PHUSE member since 2007.

Besides his academic exploits and achievements in the aforementioned fields, Dmitri is also busy with teaching commitments at the University of Genoa.