Mark at his brother's wedding.
Mark J Sienkiewicz, Jr.
  • 51 years old
  • Date of birth: Sep 14, 1963
  • Place of birth:
    Delaware, United States
  • Date of passing: Aug 15, 2015
  • Place of passing:
    Maryland, United States
Mark's brilliant mind and beautiful spirit will be forever missed.

This memorial website was created in memory of Mark J. Sienkiewicz, Jr., 51, born on September 14, 1963 and passed away on August 15, 2015.

A memorial gathering took place on November 14th, 2015 at Carroll Baldwin Hall, 9035 Baltimore Street, Savage, MD 20763.

In lieu of flowers, donations may be made to:

The Mark and Carolyn Sienkiewicz Scholarship in Oboe
Patrick O'Neall
Director of Major Gifts
The Peabody Institute of the Johns Hopkins University
1 E. Mt Vernon Place
Baltimore, MD 21202


Memorial Tributes
This tribute was added by Gary McCann on 14th September 2016

"Mark exists in the people who knew him. We enjoy his birthday because it's another day for us to be alive on earth and he would want us to enjoy it. Let him go with us everywhere we go from this moment forward as we immerse him and ourselves in the stream of life."

This tribute was added by Mary Lou Sienkiewicz on 14th September 2016

"I miss you, Markie.  We should be celebrating today. What more can I say? Love, Mom"

This tribute was added by Paula Jenson on 14th September 2016

"Celebrating the birthday of a very sweet man.  I miss you, my friend."

This tribute was added by Todd Garth on 15th August 2016

"You're still with us, Mark, in spirit, in memory, in conversation. Thanks for your continued presence."

This tribute was added by Carolyn Sienkiewicz on 15th August 2016

"Our love
        is never-ending
        is all-encompassing
        is all-consuming."

This tribute was added by Katherine Harms on 15th August 2016

"It's been a year? How did the time pass so quickly. Remembering a kind and gentle man whose death is a great loss. Carolyn, I think of you often, but I lost your email when my computer crashed last winter. If you care to write me at, I would love to hear where you are and what you are doing now. Praying that your memories will comfort your."

This tribute was added by Mary Lou Sienkiewicz on 15th August 2016

"I can't believe it's been a year since you've been gone.  I miss you you."

This tribute was added by Carolyn Sienkiewicz on 22nd July 2016

"Hello schwee. I dreamt about you. The time was current and the dream was an alternate reality. It picked up right at early July last year. You had just stopped working and we were just being together. We were gently doing things and going places. You were still sick, but gladly, weren't getting any worse. Eventually in the dream we come to July this year, 2016. You seem to be doing better. We notice that you haven't been getting any worse and in fact when we look back, we can see that you are getting stronger, your numbers are better, you are feeling better. You start talking about going back to work -- that you would enjoy that. We are still under the cloud of cancer, but so very glad that you are still here.

Then I woke up.

It doesn't take any training in psychology to see that I still can't fathom you not being here. And won't.

I miss you so."

This tribute was added by Rob Jenson on 6th July 2016

"I am missing you very much today Mark. I will be turning 53 on Friday. You would have been there, just two months later. We talked about the "Calculus of Humanity" in your last few months. We never got past some proposed axioms, but still, it was a worthwhile endeavor. Some questions don't have any "right" answers, but you used to tell me that's OK."

This tribute was added by Carolyn Sienkiewicz on 24th May 2016

"On the first anniversary that we can not celebrate together :

     'Parted from me but never parted.

     Never and always touching and touched.

     (Until) we meet at the assigned place.'

                                              [from ST "Amok Time"]"

This tribute was added by Carolyn Sienkiewicz on 14th April 2016

"April 15, 2016
My sweet, it has been 8 months since you died. The pain is so fresh I can still feel my moment of panic when I understood that you would never take another breath. Your suffering was at an end. Still, your shoes are by the door, waiting for you ... keeping company with mine. I carry your urn to the bedroom when I retire for the day, and then back out to the living room in the morning ... for I can no more bear to be away from you now than I ever could. Less perhaps, because in the past I always knew you would return ... but now I know you can't. You were so young, so very beautiful, and so very, very beloved. And always will be."

This tribute was added by Tirso Buelna Acosta on 8th October 2015

"Dear Carolyn
There´s no words to express the feelings of this lost of a great person, try to be in peace thinking that now Mark are taking care of you, like you did it for him with all love and tenderness.
Honestly Tirso Buelna
Thanks for your time"

This tribute was added by Brad Knowles on 28th September 2015

"I always felt that Mark and Carolyn were two of the smartest and kindest people I ever met, and I was honored to have known them during the time I was in the DC area and active in dc.sage.  On numerous occasions, they welcomed us into their house, and I think we were at our best when they were present.

I never got a chance to work with either of them outside of the "Random Guys and Gals Doin' Stuff", but I feel certain that I would have learned even more if I had.

I still think of Mark and Carolyn as one of the best examples of "techie couples" that I have ever met."

This tribute was added by Carolyn Sienkiewicz on 14th September 2015

"You would have been 52 today, my sweet. I love you always. You are with me always."

This tribute was added by Katherine Harms on 14th September 2015

"Mark, I know the two of you will be together in Carolyn's heart today. May all the memories be blessed."

This tribute was added by Mary Lou Sienkiewicz on 14th September 2015

"I miss you, Markie. I love you. Mom"

This tribute was added by Sandy Boone on 14th September 2015

"Happy Birthday Mark, wish you and Carolyn were celebrating it on earth."

This tribute was added by Lori Ratley on 1st September 2015

"So sorry for your loss. Our thoughts and prayers are with you."

This tribute was added by Patricia J. Barber on 23rd August 2015

"My condolences to Carolyn and family. I am a second cousin to Mark. My Uncle Jerome was my mother Genevieve (Jenny) sister. I am sorry for your loss. Patricia Janeshefskie Barber, Matthews Nc"

This tribute was added by Jonathan Crawford on 22nd August 2015

"Although I have only seen Mark a couple of times in the last 20 years, my memories from the late '80s and early '90s are still quite vivid.  Mark was a brilliant man, always calm (at least on the surface) and generally unflappable.  We were both recent graduates and often turned to one another in learning how to cope with the curve balls life threw at each of us.  I learned a lot from Mark, both technically, and in terms of how and when to be patient.  I was lucky to be there when Carolyn joined McCabe, and to watch Mark's happiness bloom.  Few things could light up a room like Mark's genuine laughter.  Carolyn, I hope the memories of Mark's love and joy and brilliance sustain you as you find your path to acceptance.  If we can do anything to help, please let us know."

This tribute was added by Vicki Laidler on 21st August 2015

"Dear Mark, friend, officemate, conversation partner extraordinaire - how I will miss our afternoon rambles across campus to talk philosophy and so much more. Already this week, I've come across several things that would have made *such* good conversation fodder - we could have talked about them for hours.

Your legacy is not only the software that you left us, but the minds and hearts that you touched. I will always remember you. And... how can I not close with a Spock quote...

"I have been, and always shall be, your friend.""

This tribute was added by Shane Wolfe on 19th August 2015

"I knew Mark through our work at STScI.  He was incredibly gifted, remained approachable and always helpful.  I learned something from him with every conversation.  We shared a common interest in Amateur radio and spoke about it a bit.  Mark seemed like a kindred soul in a way, and I always wanted to ask him more about his travels.  I'm sorry we didn't have more conversations about stuff outside of work.  Mark remained focused on his work till the end, and I know he touched many folks at STScI.  We'll miss him dearly."

This tribute was added by Pey Lian Lim on 19th August 2015

"Mark was friendly, approachable, and very knowledgeable in so many different subjects. He was an integral part of the Science Software team. He never failed to answer my many questions about software, tests, etc. He also made the weekly Science Software Branch "donut discussions" so much more interesting with topics ranging from previous job experiences to boat house maintenance. He was a great man, and will be greatly missed. Many condolences from me and my family."

This tribute was added by Perry Greenfield on 18th August 2015

"I hired Mark about 8 years ago. In seeing his application I wondered if he was Matt’s brother so I asked Matt about him. Matt said he always looked up to Mark, and that was one of the best recommendations I ever got.  I don’t think we have ever had anyone with the breadth of experience that Mark brought in all sorts of areas, and we all benefitted greatly from his knowledge, creativity and hard work coupled with his passion. Not only did he greatly aid our group’s work, he did many things to help other areas at the Space Telescope Science Institute and, particularly, innumerable staff members that needed his help. His patience with dealing with all the problems that would arise was incredible. Throughout his illness he continued to contribute to the projects here, even when it became difficult towards the end. All could see that he really enjoyed being part of STScI and its mission. He will be greatly missed."

This tribute was added by Dominic Marrese on 18th August 2015

"Dear Carolyn:

I am sorry I never got an opportunity to meet Mark in person. Unfortunately he was another exceptional individual who I met on this unfortunate odyssey that we shared. As I continue my advocacy work I will keep him in my thoughts. I hope over time that the memories of his disease and the burden you carried as Mark's spouse & caregiver are replaced by the joy and happiness of better times. Sorry I can't make to Baltimore to sit Shiva with you . I hope to have the opportunity to toast Mark's life with you in the future. All the best! Dominic"

This tribute was added by Laurie Loomis on 18th August 2015

"Dear Carolyn -

Although I barely knew Mark, your love for him (and his for you) were readily apparent. It touched me when you mentioned that he had encouraged you to get back to playing - a really selfless and loving move on his part, and the reason that we connected. Your devotion to each other was easy to see at concerts and in your updates, and I consider myself privileged to able to be included in your circle of friends. I am very sorry for your loss and all that you both had to go through during his illness, and will keep you in my thoughts as you grieve Mark's passing."

This tribute was added by Sandy Boone on 17th August 2015

"Mark, may peace surround you like a sail on the perfect day. May you see further than ever before and be enchanted while held gently to take it all in. Carolyn, may the times you've shared with Mark be the glimpses of light caught through the storm begging you to a deep, safe anchor. May you feel held and loved."

This tribute was added by Eva Kapitan on 17th August 2015

"Dear Carolyn,
I only met Mark once, but each time you and I met over the years, he was always on your mind. From you, I know the deep love you shared. I feel your grief, dear friend."

This tribute was added by Brandon Lawton on 17th August 2015

"I only knew Mark a short time at the institute, but I was immediately struck with how strong he was in keeping his convictions and fighting his battle in his own way.

Seeing his courage, strength, and tenacity will stay with me, forever."

This tribute was added by Stacy Couch on 17th August 2015

"Dear Cher,

You might think it's Mark's sweetness or how smart--unbelievably smart--Mark was that I'd pay tribute to. But it's hard for me to remember Mark without thinking of you. How you two supported one another, how you two left good jobs and a home to sail together. How he went to France, watched French television, without knowing any French (at first), all for you. And how, when the boat was no longer an adventure, you made another home together. Because wherever you were, was home.

Every time I saw Mark, cher, I saw how much he loved you."

This tribute was added by Paula Jenson on 17th August 2015

"I guess among the measures of a life well lived are how many people we have touched, and how much we are loved.  By that measure, Mark was without peers.  

Mark was brilliant - but always willing to pull the rest of us along so we wouldn't miss out on something interesting.  Whether talking about sailing or the Equatorial bulge, he always had a boy-like way of imparting knowledge as in "I know this really cool thing that you'll want to know about, and here, let me tell you all about it."

However, I think the thing I will remember most of all about Mark was his deep and endless love of Carolyn.  From the first time I met them, it was so apparent that the term "soul mate" didn't even begin to describe what they had together.

My thoughts are with Carolyn and all who loved him - and he will be forever in my heart.   /paula"

This tribute was added by Susana Deustua on 17th August 2015

"Dear Carolyn,

I knew Mark from work at STSCI, he was always helpful, knowledgeable, cheerful, kind and, importantly, patient with people who were frustrated.  He will be missed.  
My thoughts are with you and your family during this time.

Susana Deustua"

This tribute was added by Richard Davis on 17th August 2015

"On behalf of all his Reluctant Brothers across the nation and beyond, Carolyn, we offer you our love and comfort to carry you through this most difficult time. While Mark's loss will always bear grief, there comes a time when the fond, happy and fun memories prevail.

While we never met Mark, we spoke many times; it was our privilege to offer our support. His brilliant mind was so clearly evident - we will miss his presence at our meetings.

The Reluctant Brotherhood"

This tribute was added by Ray Lucas on 17th August 2015

"Dear Carolyn,

I knew Mark from his work here at the Institute. Mark was very bright and cheerfully helpful, and was very good at what he did. As such, he was a great benefit and a good co-worker to all of us, and he will be missed. From what I've read here, he was an even better person away from work and at home. That says a lot of good things about him. My sincere condolences, and best wishes for you as you go through this time of grieving."

This tribute was added by Michael Wolfe on 17th August 2015

"Dear Carolyn,

I know Mark from work. He would always help me with computer and software issues whenever I asked, whether it was my fault or not. I will miss him."

This tribute was added by Terri Lukach on 17th August 2015

"Dear Carolyn,
On behalf of Peter and all of your colleagues in the American Balalaika Symphony, please accept our deepest and most heartfelt condolences on the passing of Mark.  Although I never met him, he must have been a remarkable man for your love and concern for him was so great and so evident. Please let me know if there is anything I can do for you in the days ahead. I will keep you and Mark in my prayers, and pray that God will send you comfort and peace."

This tribute was added by Paul Goudfrooij on 17th August 2015

"I'm so sorry for your loss. It was a pleasure working with Mark, and he will be sorely missed. I wish you strength and peace during this hard times."

This tribute was added by Rosa Diaz on 17th August 2015

"Mark was one of the kindest and patient persons I have ever met at work. He also was very smart and enjoyed helping others, always with very good explanations and with a smile.  I am so glad I was able to meet him. He will be greatly missed."

This tribute was added by Corey Richardson on 17th August 2015

"Hello Carolyn,

It was a pleasure working with Mark. My thoughts and prayers are with you."

This tribute was added by Marjie Marque on 17th August 2015

"Carolyn, I only met Mark at intermissions, but he left a lasting impression on me. I will miss watching the two of you hold hands during the break."

This tribute was added by Jill Morrow on 17th August 2015

"Carolyn, what I knew about Mark was what I saw reflected in you, and what a lovely reflection that was! When you spoke about your life adventures and the decisions you two shared, your connection and love was obvious. You have been very strong for a long time, a loving strength given during the most difficult time ever. What Mark inspired in you tells me what a special person he was. Love and peace in your grieving. I am so sorry for this huge loss."

This tribute was added by Terri Syme on 17th August 2015

"Carolyn, I only knew Mark through you, and from that, I understood the wonderful and loving relationship you two shared.  Know that you are in my thoughts and prayers."

This tribute was added by Gary McCann on 17th August 2015

"Carolyn, how much Todd and I enjoyed our Saturday afternoon visit with you and Mark in April. What shone was what a brilliant, interesting person Mark was to talk to. Even his illness, at that late date, didn't take precedence over what an engaging person he was. We drove home talking about what a pleasant afternoon it had been and how amazing Mark was to have made it so."

This tribute was added by Katherine Harms on 17th August 2015

"I know Mark mostly through knowing you, Carolyn.  Your love for him was evident always, and only shone brighter through this trial. My brief occasions for conversation with him showed me that his love for you was equally deep. I keep you in my prayers with deep respect for the dignity and courage of your grieving. As much as a friend can do, I share your grief."

This tribute was added by Corinne Borel on 17th August 2015

"Dear Carolyn
My password for this site was forever love.   Even though I only met him once years ago, the deep love and regard you two held for each other was obvious even at a distance.  I am sincerely saddened by your loss and by what must have been such a difficult year.   I don't doubt that your presence soothed and nurtured him while he went through such difficult times.   I will be leaving town Wednesday so likely won't make it to stop by, but know that my thoughts are with you.   Again, even at a distance I knew you two had/have a special love.  Sincerely,  Corinne"

This tribute was added by Carolyn Sienkiewicz on 17th August 2015

"To my love ... with me always."

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This memorial is administered by:

Carolyn Sienkiewicz
Rob Jenson
Vicki Laidler


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