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B: 1933-04-27
D: 2020-02-24
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B: 1938-08-30
D: 2020-02-24
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Theresa H. (Mariano) Pozerycki
B: 1923-12-17
D: 2020-02-23
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B: 1960-12-17
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B: 1928-10-31
D: 2020-02-21
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Peter Michael O'Callaghan
B: 1959-10-20
D: 2020-02-19
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Ann (Lalli) Mosca
B: 1921-08-16
D: 2020-02-17
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Richard Lyle (Dick) Brewer
B: 1940-03-16
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Jane Enola (Wiley) Smith
B: 1930-03-29
D: 2020-02-08
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470 Massachusetts Avenue
PO Box 882
Acton, MA 01720
Phone: 978-263-5333
Fax: 978-263-8193
Mario E. Castaneda

Mario E. Castaneda

Saturday, March 21st, 2020
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Mario E. Castaneda, Age 61 of Acton, MA died unexpectedly on March 21, 2020. Born in Mexico City to Elvia and Humberto Castaneda, he moved with his family to the US in 1968 and grew up in Yuba City, California. He received his undergraduate degree from University of the Pacific in Stockton, CA and his MBA from UCLA. While at UCLA he met his wife, Cathy.

Cathy and Mario moved to the Boston area in 1990 where Mario worked in marketing for Polaroid. They ultimately ended up in Acton in 2001 where they raised three boys, David, Mark, and Peter. He continued in the marketing field as a consultant first for Stratx International and later at his own firm, Blue Sail Consulting. He loved his work and the opportunity to travel worldwide. Most recently he brought his skills to UMass Lowell where he taught several business classes.

Mario loved the outdoors and enjoyed all that nature has to offer including hiking, running, skiing and snowshoeing. He could be seen every morning on the trails in Acton with his two dogs by his side.

But Mario’s greatest joys were his family, including his wife, his three sons, and the family dogs. He enjoyed all the boys’ activities during their youth, and as they grew took pride in their accomplishments in school and the workplace. He was also a prolific and exceptional photographer, memorializing every event.

Mario will be remembered for his ever-present smile, booming voice, and cheerful disposition. He will be missed for his enthusiasm for life. In addition to his wife and children, he leaves his mother, Elvia, and sisters Myriam (Mike Olivo) and Martha. He was pre-deceased by his father. He also leaves his sister and brother in laws and many nieces, nephews, and cousins.

Due to the State of Emergency regulations on the number of people attending a public event, all services will be private at this time. A public celebration of Mario’s life will be held at a future date.

For those wishing to leave online condolences, please visit his memorial page at
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    A Life Celebration is planned for a later date.
    Due to the State of Emergency regulations on the number of people attending a public event, all services will be private at this time. A public celebration of Mario’s life will be held at a future date.


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Private Condolence

Mark Matson

Posted at 09:47pm
Mario, so full of life, so kind and caring. It's so incredibly sad that he's left us. I remember playing soccer with him at Leary and our many Scout trips with our sons. Philmont was an adventure and Mario gave us some much needed advice from his experiences as a guide. He said he'd packed light but he had 50 pounds of camera gear and electronics; I joked that the sun would dim when he plugged all of his gadgets into his solar charger. I also have fond remembrances of him at Nantucket, helping him cook fish and make pico de gallo. He was the true chef and I was the under-understudy. The next year his son Mark had graduated so they didn't come, and I sent him a frantic text asking for the recipe. Of course he answered promptly. Mario always came through when you needed help. Cathy and sons, may God bless and comfort you.

Jennifer Miller

Posted at 05:10pm
Cathy, David, Mark and Peter,
I have been trying to find a picture or video of our Uncle Mario to upload to this site, but then I remembered -- he was always the one taking the pictures at our family gatherings! Even absent the photos, I have so many memories of him over the years, even long before you boys were born, and they all involve laughter, adventures, good food (or at least spicy food) and the great outdoors. We will miss him terribly, and we will cherish the memories of an amazing husband, father, brother-in-law and uncle. Mark Twain once said "The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time." I hope we can take comfort in knowing that Mario lived fully in everything he did. May his memory be a blessing.
Love, Aunt Jennie

Sandra Richtermeyer

Posted at 10:37pm
Cathy and family, we are so sorry for your loss. We were so fortunate to have Mario as an adjunct faculty member in the Manning School of Business at UMass Lowell. Mario was a great educator and he made such a difference in the lives of his students by sharing his expertise and inspiring them with hopes and dreams for their own career journeys. Not only did Mario make a difference in the lives of his students, he made such a difference for his colleagues too. The day before he passed, he took time out of his busy schedule to give our faculty a webinar and help them prepare for the new online environment during this unprecedented time. We will remember him for always having a smile on his face and being a genuine and dedicated professional and wonderful and kind person. We were blessed to have him touch the lives of our students and faculty.

Ryan Bettez

Posted at 05:21pm
Cathy and family I am so sorry for your loss. Mario truly filled the room with his smile and energy he always jumped at the chance to make things happen. I feel so lucky to have known him.

Donald Leopold

Posted at 12:10pm
Cathy, I am so sorry to hear of your loss. Please know all of the Leopold's are thinking of you and mourning your loss. Best, Don

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