About GeoSera

GeoSera is a consulting company specializing in the management and execution of high quality clinical research trials. Contracting with GeoSera allows for sponsor companies to delegate the oversight and execution of their pipeline to experienced clinical research professionals who excel at leading phase I-IV clinical trials, entire Clinical Development Plans, and in-house and outsourced study teams. Our experiences give GeoSera a competitive edge since our team understands the high level strategy of clinical research while executing the day to day operations of clinical trials.

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  • Over the course of the past year, John really stands out as someone who exemplifies a work ethic that is very rare these days. He is the first person to go above and beyond on any collaborative project. Even on the toughest of protocols, he handles every challenge effortlessly. Despite being a pharmaceutical client of mine, he makes our research team feel as though he is working for us. This has been incredibly effective as a way to get things done and prioritize his clinical trials. He’s excellent at Clinical Operations and managing even the toughest of circumstances. We are fortunate to work with such a dynamic person like John and he can always count on us to go out of our way for him.
    Bonnie Segal
    Owner/Co-Founder of Segal Trials
  • I had the pleasure to work with John Diaz on three protocols in the Medical Monitor - Operations Manager relationship. He was enthusiastic, diligent and proactive throughout his participation in the oversight of each clinical trial on which we collaborated. It was my pleasure to work with John and I look forward to working with him again.
    Maciej Gasior, MD, PhD
    Executive Director, Clinical Development at Marinus Pharmaceuticals
  • I had the pleasure to hire John to take over one of development programs under my responsibility. I delegated all operational details of this program such as budgeting, vendor and project management as well as delegating strategic responsibilities to John. I was confident that John could take ownership of and execute all tasks related to leading the program. I thoroughly look forward to working with John Carlos Diaz again and highly recommend John Carlos to lead any drug development team or program.
    Raul P. Lima, MA, MBA
    Vice President, Head of Clinical Operations
  • John Diaz reported directly to me from 2012 to 2015. I was confident that John could easily handle the responsibilities of vendor and budget oversight for clinical trials. John manage complex protocols while coordinating communication and trial related information across multiple departments with minimal supervision. During an Advisory Board meeting, John was praised for how efficient the clinical trials that were under his management were conducted. John is a strong leader, a diligent worker and has knowledge of many therapeutic areas and functions within clinical research. I strongly recommend John.
    Erika Parker Zavod
    Sr Director, Clinical Development Strategy and Planning, R&D at ACADIA Pharmaceuticals Inc.
  • I consider myself fortunate to have had an opportunity to collaborate with John recently. John is adept at Clinical Operations and seamlessly integrated into our in-house team. He used his extensive professional networks to quickly recruit vendors that could meet our deadlines while maintaining quality. He ensured that the Research and Development team was frequently updated on the status and conduct of his activities. I was impressed by John’s ability to predict our needs and work collaboratively with cross-functional teams to achieve our corporate goals. I would jump at the chance to work with John again.

    Colville Brown, MD
    Executive Medical Director
  • I hired John Diaz in 2010 based off his enthusiasm, knowledge and his affability. John was a quick learner who required minimal supervision. I had the utmost confidence in John to deliver quality oversight of the clinical trials that I assigned to him. John worked well with other departments to ensure that the operational risks of his trials were thoroughly evaluated and then proposed efficient solutions. It was unfortunate that our organizational structure changed and John no longer reported to me. I sincerely hope that John's and my career paths cross in the future and would hire John to report directly to me again.
    Susan Torchio
    Director, Global Clinical Operations at Optinose
  • I have had the opportunity to work with John over the past 4 years on a number of different clinical programs. I have been a medical director / monitor for many years and have worked with a number of directors of clinical operations and would put John at the top of my list when thinking about this role. John is thorough, complete and attentive to detail, and simply gets the job done. He is tireless in his interaction with sites and he moves projects along with a firm but pleasant style. I have also had the pleasure of working with John when issues have arisen which require immediate attention. In such situations, I have found him to work with a sense of calm and urgency, working with the team to get problems fully characterized and resolved. All said, I would highly recommend John as a director / leader of Clinical Operations.
    Robert Allen
    CEO, Allen Medical
  • I have had the privilege of working with John Diaz for several years on a large international program in which John as serves as the Program Manager. John’s attention to detail, while not losing site of the bigger picture, have helped to advance the program, expedite timelines, and maintain a collaborative working environment with internal departments, sites and vendors. I have truly enjoyed working with John on this program.
    Danette Powell
    Ranvier Research, Inc.
  • Various site department staff and I have worked with John for several years on numerous CNS indication clinical trials, and I can safely speak for all these team members when I genuinely assert that John is at the top 1% of Program Managers within the industry. He possesses several qualities to earn this claim, including but certainly not limited to his astute organizational skills, knowledge and steadfast commitment of what entails a high standard of quality and the nuances regarding how trials are accurately and safely conducted, ability to motivate other team members to complete timeline work, his connections within the industry which helps ensure all aspects of a clinical trial are addressed, and last but certainly not least, his strong communication proficiency applied across a variety of trial services to ensure comprehensive coverage of tasks. Moreover, I do not think there has ever been a time when any of us saw John be negative or stressed – his temperament for staying calm, cool, and collected in the midst of resolving complex trial issues is extraordinary and infectious to the entire study team. In sum, any sponsor or CRO would be immensely lucky and could take a sigh of relief having John lead their study team.
    Elan Cohen
    Principal Investigator at Hassman Research Institute
  • I’ve never seen anyone multi-task quite like John. He has an outstanding ability to juggle multiple complex projects at once, and that’s in addition to the intelligence, competence, and years of experience he brings to clinical operations. When John was my manager, he consistently coached me, taught me the skills and industry-related knowledge I needed, responded quickly and helpfully whenever I had questions, facilitated my professional advancement, and was an all-around outstanding person to work with and report to. He’s extremely hardworking and doesn’t shy away from difficult tasks or staying late to get a job done or help a colleague. He was always supportive, transparent, willing to help, and invested in my success. I felt very lucky to have him as my manager.
    Marisa Gorovitz, MSW, LSW
    Clinical Program Manager at NeuroRx Pharma
  • I have known John Diaz since 2010. John brings a tremendous amount of energy to any project and has always impressed me with his level of experience, dedication to projects as well as ability to meet difficult timelines. As a colleague, I have appreciated his non-siloed and transparent approach in regards to communication a team dynamic. It would be my pleasure to work with John again or recommend him for any future opportunities.
    Charles E. Bell, MBA
    Sr. Project Manager at Novo Nordisk
  • I had the pleasure to work with John Diaz at Merck in Merck's Clinical Pharmacology department. John was an energetic, knowledgeable colleague who learned and followed the Merck processes quickly and effectively. I highly recommend John for any position within Research and Development and I hope that I get to work with John again in the near future.
    Sean Gill
    Clinical Project Manager at Spark Therapeutics, Inc.
  • Thank you greatly for your kind words to my interviewer! I truly appreciate it. I’m very happy that I had you as one of my mentors and thank you again for sharing your wisdom and experiences with me in clinical research.
    Chantelle Rampersad
    Assistant Clinical Research Coordinator
  • Thank you for the extremely valuable knowledge you shared with us during your presentation of a clinical trial protocol at Fastrack! Your honesty was refreshing and much needed. You truly brought a perspective to the table that hadn’t been considered yet in the course.
    Devin Darcy
    Clinical Trial Associate at Bristol-Myers Squibb