Donald William Moncevicz, P.E. of West Dennis, Massachusetts died peacefully in his home, surrounded by family, on June 10, 2026. He was a native of Brockton, Massachusetts, born to William and Gladys (Johnson) Moncevicz. Don and his wife Sandra raised their family on Cape Cod. He enjoyed a long life, with government and civic service playing central roles.
 
An Eagle Scout and a graduate of Brockton High School (1953) and Northeastern University (1958), Don became a civil engineer. As one of a select group of uniformed officers of the United States Coast and Geodetic Survey (now NOAA), Don worked to map ocean depths off the coast of Cuba and was leader of the survey party in connection with the construction of the Glen Canyon Dam and Lake Powell in Arizona. One of his assignments required him to travel to locations around the country with sensitive instruments to measure the Earth’s gravitational pull. He rose to the rank of junior lieutenant.
 
Following the completion of his service, he married fellow Brockton resident Sandra MacKenzie in 1964. They were blessed with two daughters, Lisa and Jill, and they moved to Dennis shortly thereafter.
 
Don threw himself into local civic life, helping to start the Town’s recycling program and serving as a Selectman from 1974-1977, during the nation’s Bicentennial celebration. He also volunteered on other local committees and with the Congregational Church of South Dennis. Later in life, he worked with the local land bank to preserve properties for conservation.
 
Don led a long and varied career of federal government service, working as a civilian Department of Defense employee with the U.S. Army Corps of Engineers, and at military installations throughout the Northeast, including Otis Air Force Base and Naval Air Station South Weymouth. He retired from Acquisition Civil Engineering at Hanscom Air Force Base in 1990, after more than 30 years of government service.
 
Following his retirement, Don hung out his own shingle, serving private clients for three decades on surveying projects, coastal property protection measures, and particularly the design of sanitation systems for Title 5 compliance. He was a member of the American Society of Civil Engineers and a regular fixture before local boards and commissions on Cape Cod and the South Shore, advocating for environmental and conservation issues and representing his clients.
 
As important as his career and volunteer service were to him, Don most valued time with his family. When his children were young, their adventures included frequent trips to St. Thomas in the U.S. Virgin Islands, ski excursions, and exploration of the United States. He meticulously planned each Christmas smorgasbord, an homage to his Swedish roots, and every New Year’s Eve since Y2K was marked by “Don Fire,” a beach bonfire, which was later moved to a backyard fire pit. His grandchildren could never leave from visits without him chasing them down the driveway with a fistful of Sacagawea golden dollar coins.
 
Always the engineer and Boy Scout, he instructed his family to “start with a map”, that “you can never have too many flashlights,” the differences between dunes and coastal banks and concrete and cement, the destructive power of water, and the glory of a “one-match” fire. He loved rocks, especially those brought to him by others from throughout the world, and he enjoyed the challenge of building stone walls.
 
The defining travel passion of Don’s life came in the late 1990s, when he visited and fell in love with western Newfoundland, particularly the area around Gros Morne National Park. With rare exceptions, Don returned once or twice a year, introducing his entire family to this unspoiled land. He found himself in Newfoundland during the U.S. airspace closure on 9/11, and he was a familiar face to the locals in Rocky Harbour and Woody Point. Don took particular pride in an ongoing project, building a large U.S.-Canadian “Friendship Shelter” from driftwood and other found items on a stretch of rocky beach.
 
Don is survived by his loving wife Sandra (MacKenzie) Moncevicz, with whom he shared 62 years of marriage; his two daughters, Lisa Moncevicz and her husband Joseph Curro of Arlington, Massachusetts; and Jill Spencer and her husband, John of Hudson, New Hampshire; his six grandchildren: Savannah Curro of New Haven, Connecticut; Sierra Curro of Arlington, Massachusetts; Andrew Spencer and his wife Kristin of Wilmington, Massachusetts; Kyle Spencer and his wife Olivia of San Diego, California; Timothy Spencer and his wife Sarah of Exeter, New Hampshire; and Katie Spencer of Hudson, New Hampshire; as well as a number of nieces and nephews.  Don was predeceased by his two half brothers, Richard Blair and Leo Blair, Jr.
 
The family wishes to thank the caring staff of VNA of Cape Cod Hospice and Cape Senior Home Health Care for their support and attention to Don’s needs during his final months.
 
Those who wish to honor Don’s memory are invited, in lieu of flowers, to make a donation to the Dennis Conservation Land Trust (https://dennisconservationlandtrust.org/) at P.O. Box 67, East Dennis, MA 02641 or to VNA of Cape Cod Hospice via the Cape Cod Healthcare Foundation (https://support.givetocapecodhealth.org/donate) at PO Box 370, Hyannis, MA 02601.
 
Visitation will take place from 1:00 PM to 2:00 PM, with a celebration of life following at 2:00 PM on Saturday, June 20 at Hallett Funeral Home, 273 Station Avenue, South Yarmouth, Massachusetts. Burial will be private. To view livestream please visit Donald W. Moncevicz - Hallett Funeral Home - OneRoom Streaming

To all of Don's family- I just watched the celebration of life online and am so struck by the love in the room, the detailed stories, how known Don was and the multitudes of influences he had on his family and community far and wide. I'm grateful that as a neighbor of the Curro-Moncevicz family I've been welcomed into this love over the years, and I'll be sad not to see Don again even though I will see him, now that I know, each time I talk or spend time with each one of this beautiful family. Rest in peace, Don. Your legacy is in very, very good hands. My love to you all. Deborah

We send our deepest condolences to Mrs. Moncevicz, Lisa, Jill and their families. We've known your husband and father for over 14 years, albeit during brief stays during the summer months in Don's Mother's home. Each time he would visit the home, and we were there, we had delightful conversations with him. He was a joy to see. We will miss him dearly.

Jill, John and family. What a beautiful obit. Sounds like he had a wonderful full life. Wishing you lots of great memories and God's peace.

Lisa and Jill, I was so sorry to read of your dad's passing. I have so many wonderful memories of him when I was a kid growing up around your family - camping in your backyard, road trips, birthday parties, band events, sleepovers in the basement. And of course, how wonderful he was to use his copier to print our "celebrity magazine" that we sold to our friends and family! He was our "publisher," and I think he was our first "subscriber!" He was so supportive. I will always remember his kindness. Sending my love to you and your mom, Laura

To The Family, Please Accept My Heartfelt Condolences. Truly the loss of a precious loved one is most difficult. Please find comfort in the promise our most loving Heavenly Father Jehovah God gives us in Revelation 21:4"And He will wipe out every tear from their eyes and death will be no more; neither will mourning; nor outcry; nor pain be anymore. The former things have passed away." Yes, We can look forward to a time soon to come when all suffering includng death will be done away with forever.

So sorry for your loss. Thoughts and prayers are with you and yours.

I am sending blessings to Sandra, Lisa and Jill. I had a chance to stop and talk with Don and Sandra during a Cape Visit. I cherish the many memories of Don and the family.

Compassionate Condolences. May joyful memories sustain you through the grieving process.

So sorry for your loss. He had a very eventful life. May you cherish all the great memories

Dear Jill and family, We are so sorry for your Dad’s passing. Even though I did t know him, it looks like he was a remarkable guy!! And he raised a beautiful, loving g daughter and family. Lots of love, Jim and Fran Gorton

Hi Sandra, Thinking of you and your family. Though it has been many years I often think of your folks and the friendship they had with my folks. I was thinking of your dad just the other day , and the many places he took my dad and I fishing on the Cape. Once again, my condolences. Jeff Peterson, Harrison, Maine

Beautiful obituary. Unfortunately I will be unable to attend