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Paul Pereira
November 8, 2025
Hard to believe it´s been 4 years - you´re still in our hearts. Rest in peace.
Paul Pereira
November 8, 2023
I met Glen at Medidata customer in 2005 and became a friend. He will always be missed. RIP!
Sanghoon Han
November 8, 2022
Good leader like Good friend.
Miss your bright smile.
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Karim P. Husain, Esquire
January 27, 2022
I was friends with Glen at Carnegie Mellon. When I heard of his success, it did not surprise me. Glen had a very warm and engaging personality. I wish to extend my sincere condolences to his family.

Henry He
January 8, 2022
I joined Medidata in July 2017. Right after I joined, on a bright and sunny day, I went up to the ninth floor to say hello to Glen and Tar. I saw Glen was standing in front of his laptop and concentrating at work. I walked into his office and introduced myself. Glen smiled at me and was so friendly asked me about which department and what project that I was working on. That was the first time I talked with Glen. To me, Glen is a charming leader. He attracts everybody's attention when he was talking. He knew the Medidata business inside out. On top of it, he was so technical savvy, he kept his eyes on all the new technologies and what happened in the industry. I feel deeply sad when I heard the tragedy. He will be remembered forever!!!
A medidata customer from India
December 21, 2021
I also don't know Mr. de Vries personally but I am inspired after reading about his story, accomplishments and visions. Thank you for your contributions to the science, IT and clinical.
Jenise Lowe- a Medidata user
December 3, 2021
I did not personally know Mr. de Vries but I am moved after reading about his accomplishments, visions, and drive. Thank you for all your contributions toward a better world for all of us.

Shawanda "Shawn" Legall
December 2, 2021
I met Glen at Columbia Presbyterian in the 90's. He and Ed Ikeguchi brought me over to Medidata. He provided an opportunity and was there for me during it all. I seek solace in that I did tell Glen before the Blue Horizon flight how proud I was of him and how he was a true innovator and so inpirational. I will truly miss Glen and that smile. My condolences to the family.
Tetsu Morita
November 30, 2021
I still remember my Welcome party when I joined Medidata. You were talking about going to space, and I just heard that you made it happen, but I can't believe you're gone now. Never forget Gren, I had a great time with you.
Louis Gilbert
November 29, 2021
Glen and I had just reconnected through a mutual love of technology and aviation. I still remember the epic after party when Glen received the E&Y entrepreneur of the year award. You will be missed, fair skies and tailwinds.
Wendy Lurrie
November 19, 2021
Knowing and working with Glen was a privilege and an honor; I cherish every moment we had together. He was an extraordinary human in every way, who made a difference in so many lives. We will honor his memory by focusing on our mission. May his memory be a blessing. I miss you so, Glen.
MAZZA Valerio
November 19, 2021
I didn't have the chance to meet him personally but working in the same company I eared a lot about his dreams and visions and we will keep them alive!
R.I.P.
Leon Harris
November 18, 2021
My sympathies in this time of suffering. Glen was such a force. May he rest in peace.
Ansuman Panda
November 18, 2021
This World definitely going to miss Glen and his innovation.
Alan de Vries
November 17, 2021
Glen was a most extraordinary person and a wonderful son. Thank you all for your most kind thoughts.
Paul Ajayi
November 17, 2021
My deepest condolences to the Medidata family. May God give his loved ones, families and friends the fortitude to bear this irreparable loss.
Janice Quiros
November 17, 2021
My deepest sympathies to the de Vries and Medidata families. I´m grateful for the time I got to know Glen from working at Medidata and beyond. He was kind, funny, and generous. He´s accomplished so much and made a huge impact in his short life. The world has lost a visionary. May his legacy continue and his memory serve as a reminder to all of us to dream big and serve others, just like he did. Rest In Peace my friend.
Joe Mele
November 17, 2021
My deepest condolences. It was a privilege to work with Glen. I will do my best to continue his legacy by drawing on his passion for patients and the environment.
Takako Narita
November 17, 2021
Missing you so much, never forget you, how lucky I am had a joyful time with you. Thanks Glen.
Sanghoon Han
November 16, 2021
I will pray for you, and keep you in my thoughts.
Rest In Peace, dear boss & friend.
Wishing you comfort and peace.
Gene Altman
November 16, 2021
My sincere condolences to the family. Glen was a down to earth, genuinely good person and someone I will remember for the rest of my life.
Junyong
November 16, 2021
I'm very saddened to face Glen's passing and can't forget our talk in the saint kitts and nevis. Glen, You worked very hard and please RIP.
Millie Nadal
November 16, 2021
I am deeply sorry to learn of Glen's passing. My deepest condolences to his family and friends as well as his Medidata family.
Millie Nadal
Madhuri Chavali
November 16, 2021
Glen was a remarkable leader and a visionary. I still cannot believe this and so sad to hear. My deepest condolences to his family, friends and Medidata family.
Jeffrey Cohen
November 16, 2021
My sincerest condolences on the passing of Glen. He has definitely made an impact on me, and I imagine everyone who knew him. RIP.
Dayasagar Salian
November 16, 2021
I remember seeing you going to space in New hire orientation. You inspired me to always work hard and do big and think big. Wanted to atleast shake hands with you once.

Matthew Hall
November 16, 2021
RIP, Glen - you were an incredible scientist, entrepreneur, colleague, astronaut and human. I'm so glad to have known and connected with you through work and Star Trek.
Ed Slezinger
November 16, 2021
An ultimately charismatic, fun-loving, enigmatic professional, with never-ending goals to make this world a better place. It is our loss, that Glen was lost so early in his life. I am honored and blessed to have shared time with you Glen. I wish love, strength, and peace to your family and friends.
Kamala Raghunath
November 16, 2021
It has been a joy knowing Glen for the 17 years I have been working in Medidata. A human being who brought light and joy wherever he went. I will never forget his smile - it stayed on his face and made everyone welcome. He lived his life the way he wanted to but kept a pulse on serving humanity and bringing education and cure to a large population that desperately needed it. Glen was both a leader and a visionary. His dreams will live on. My sincere condolences to his bereaved family, parents, sisters, friends, and the larger Medidata family.
I will dearly miss Glen with one consolation. He has left behind such a treasure of memories, they will tide my way in days to come.
Om Shanthi.
Abdul Rastagar
November 16, 2021
my deepest condolences
Nelia dela Cruz
November 16, 2021
Rest In Peace Mr. de Vries. The universe lost a great contributor, but heaven gain a faithful child who uses all the talent and skills that he was provided with for the good of all mankind.
Paul Pereira
November 16, 2021
I like wish my deepest condolence to family, Tarek and all his co-workers. Glen was always reachable and available to discuss any topics, plus always had a positive outlook in life. He will be dearly missed in the pharma industry and in life. RIP
Anthony Cunningham
November 16, 2021
Deepest Sympathy on the passing of Glen. I can truly say that he changed my life and that of my family. RIP.
Wendy Wang
November 16, 2021
Glen was a great leader and role model. He brought so much energy and inspiration into my intern cohort as many of us have returned to Medidata. He left behind a legacy and he will be missed dearly.
Rajesh Lingam
November 16, 2021
Unbelievable. May his soul rest in peace.
Brock Boyce
November 16, 2021
So sad to hear. I'm glad he was able to journey to space, as I know it was a dream for him. Prayers and blessings to those close to him. What an inspiration. I didn't know Glen but I found out who he was when he went into orbit. Our company uses Medidata so that caught my eye. So nice to see someone at his level wanting to do so much more for others and our planet.
Karen Ma
November 16, 2021
My deepest condolences to the man who changed the face of research.
Kevin C
November 16, 2021
So sad to hear just now the loss of this genius guy who push the life science industry moving forward so strong and I was so inspired by his passion and devotion even during the one conversation in the open-air balcony after attending the first annual user meeting in China.
Esther Peralta
November 16, 2021
Glen embodied his passion and his mission in every way. That is the true measure of a leader that people are happy to follow. My deepest condolences to his family and close friends, and to my fellow colleagues at Medidata.
Maria Rivas
November 16, 2021
Missing this remarkable leader. Inspirational and positive always. My deepest sympathies to Glen's family, friends and fellow colleagues.
Maria Rivas
Mieno Yamagishi
November 16, 2021
I still cannot believe. I was happy to see you on Youtube when you went space after years.
I miss your smile. You are truly Medidata´s treasure. I want to see you again.
Jonathan Gibbs
November 15, 2021
As a medidation, I can´t even describe the impact Glen had on me. So many others have so much more to say but I met him often and he left a real impact on my life and what I do every day. Missed is an understatement. A shining light. J
Shalini Mathur
November 15, 2021
Glen was always smiling and cheerful while leading Medidata through numerous changes..he lived life to the fullest and had an infectious energy. It´s really hard to believe he is no more, but his legacy shall live on. My sincere condolences to Glen´s family. Hope God gives you & all his well wishers strength in these difficult times.
Nitza Hauser
November 15, 2021
Glen was a true leader - genius visionary, charismatic, caring & compassionate, full of never-ending energy. He left a truly amazing legacy and a big hole in Medidata's heart.
Jenny Herdman Lando
November 15, 2021
Just over 4 weeks ago I was so glad to reconnect, from a distance, with everything that Glen was up to. When I heard he would FINALLY meet his goal of being in space, even for such a short time, I was so joyful. In high school everyone knew how much he loved science and space. What I want people to know is how much he loved life. If you were his friend you were seen and appreciated. HIs laugh was infectious and he cared for people in his sphere. Clearly his work showed he cared for all people. 4 weeks later and I am struck numb. This tragedy is so hard to manage. I send Glen's family and all of our high school friends enormous hugs. He will be missed and I hope his memory is eternal.
Bhargav Koduru
November 15, 2021
Condolences to the family!
Jen Chu
November 15, 2021
My heart goes out to Glen's family and friends. Glen is an an inspirational leader, who we will continue to be a legend even after.

Brad Lawrence
November 15, 2021
Glen was the best roommate one could have and an even better friend. I was blessed to have shared a room or apartment with him for 3 years. He indeed and literally lit up any room he entered with a huge personality that was both gregarious and humble at the same time. I've spent the weekend being bombarded with memories of our times together. I've smiled and laughed and cried a lot. I've felt a lot. And that's what Glen's effect was on nearly everyone he met. An infectious influence to feel emotion. You would "feel more" after interacting with him, and you'd come away being a better person as a result. I'm going to miss my dear friend, and I thank him for making me a better person having known him. - Brad
John Clayton Rehfuss
November 15, 2021
While I did not know him that well, he was always approachable and conversational when I would run into him in the New York Office. To me he was and is the essence of Medidata and all it strives to be.

Anthony D´Amico
November 15, 2021
My deepest condolences to Glen´s parents, sisters, family, friends, fellow colleagues, and to his best friend-brother-Tarek. Glen´s legacy and vision will live on and be carried by the countless people he touched and benefitted during his time on this planet.
A month ago we cheered Glen on and counted down from the 6th floor when he blasted off into space, with Captain Kirk!! And who of all people drives Glen and his crew mates to the rocket...Jeff Bezos!! Talk about epic! My kids remembered Glen and Tarek from bring your children to work day at Medidata a few years back and they couldn´t wait to watch the launch video when they got back from school. It was actually the first day-maybe ever-that my kids asked me how work was today. We are all so happy that Glen got to live his dream of going to space. He got his astronaut wings from Jeff Bezos last month and now he has his heavenly wings from the Lord.
So much has been said about Glen from people who knew him much more closely than I did. I am proud to say that I had the privilege of working with him.
To the man who didn´t need a script for an earnings call and was always the most passionate about our great company-Medidata. Godspeed, and fly high @Captainclinical
Anthony D´Amico
Mary Wyatt
November 15, 2021
Glen was an outstanding human who will be sorely missed. I am so sorry for your unbelievable loss. It is an honour to be part of a company that he and Tarek built. Our thoughts and prayers go out to you all.
Mary Fiedorek
November 15, 2021
Dear Madelyn,
I am so sorry for your loss. Glen must have made you very proud. Mary Fiedorek Mayland---Streets & Co
Chellie Esters
November 14, 2021
Glen was a great person - a down-to-earth genius who believed in a better world. It´s a blessing that he got to see that world from beyond the clouds. Thank you, Glen, for being brave enough to dream big and think disruptively. Your ways of thinking has stuck with me well past working with you at Medidata. And also, thank you for being Medidata´s biggest fan of MDSOUL. You will be missed.
May God bless his soul, and comfort the family, friends, and all who love him.
God speed, Captain Clinical.
Keith Lampman-Perlman
November 14, 2021
Madeline and Ian,
I hope you find some comfort in knowing that many people, old friends like me, as well as strangers, are keeping you, and yours, in thought and prayer.
What a legacy your dear Glen created during his short time on Earth.
Lean on each other...
With love, Keith
Neena Dhamoon
November 14, 2021
Condolences to the family. Medidata has truly lost a friend, a leader and someone who stood for all of us.
Beth Thomerson
November 14, 2021
Glen was an inspiring, joyful visionary. It was always a pleasure to be in any room with Glen, whether it was real (the legendary parties!) or virtual (the many All Hands meetings). None of us ever left an encounter with Glen feeling less than inspired and enthusiastic about furthering his and Tarek's vision of making clinical trials better, helping patients through their journeys. For Glen, the only direction was forward; for all of us who had the honor of working with him, we'll return the honor by forging ahead, striving for excellence as he modeled it. He was unforgettable and epic. May his family, friends, and loved ones find peace, comfort, and strength in memories and in knowing so many colleagues are also mourning for a life well-lived, albeit far too short. Rest in peace, Glen.

Nina Pruitt
November 14, 2021
Thank you Glen - you have profoundly impacted me personally and professionally. See you on the flip side - likely you'll hear me first :). Until then, a tequila toast!
May your family and friends find their way to peace despite the exceptional gaping hole in all of our hearts.
With love - Nina
Hilary Bayer
November 14, 2021
Please accept my sincere sympathies on the passing of your dear Glen. My thoughts and prayers are with you as you mourn. May Glen's memory be a blessing.

Sally cardy
November 14, 2021
Sending so much love to you all. I was Katie´s nanny and used to hang out with Glen and his friends. He took me to my first nyc midnight movie ....." Batman". We laughed a lot and shared some great memories. What an amazing character. What a light he was and I loved him.
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