Dennis passed away unexpectedly at work due to a heart attack. He was a native San Franciscan and first generation Irish American. He is survived by his adoring parents Eileen and Patrick O'Sullivan and his loving sister, Margaret O'Sullivan. He also will be missed by his cousins: the Villalobos, Becker, McSweeney and Murray families in the US as well as all his cousins in Ireland.

Dennis was a proud graduate of St. Anne's grammar school and St. Ignatius College Preparatory, class of 1980. Upon graduation in true entrepreneurial spirit, Dennis started his own company, Dennis' Towing, and assisted many a friend when they were stranded on the streets of San Francisco. Dennis embarked upon a second career with the Retail Clerks Union and spent the last 30 years working at Lucky stores in San Rafael, Napa and Vacaville. He was known for his charismatic smile, warm personality and genuine love of people. His customers willingly waited extra time in his line so that they could be greeted with his charming disposition.

Dennis was an avid Harley Davidson fan and spent many a weekend riding cross country and participated in many Sturgis motorcycle rallies. He truly enjoyed the peacefulness of outdoor life. Being on his ranch and taking care of his animals gave him tremendous comfort and joy. His parents are extremely proud of their son and his accomplishments. He will forever be in the hearts of all those who loved him.

Friends may call Friday, February 23rd after 10:00 am at St. Cecilia's Church where the Rosary will be recited at 10:30 am and the Funeral Mass will be celebrated at 11:00 am. Committal, Holy Cross Cemetery, Colma. Donations to Ronald McDonald house preferred www.rmhc.org.

To plant trees in memory, please visit the Sympathy Store.

Published by San Francisco Chronicle from Feb. 17 to Feb. 21, 2018.

Memories and Condolences
for Dennis O'Sullivan

Sponsored by Duggan's Funeral Service - The Duggan Welch Family The Duggan Welch Family.

19 Entries

Thomas Allen

December 4, 2021

I spent many years at Lucky Stores with Dennis and the man was a genuine person. I was telling a friend about our escapades back in the eighties and looked up his name on the internet. Truly sad that I will never agin be greeted by that huge personality and genuine smile. RIP brother

Margaret O'Sullivan

August 26, 2019

Dear Dennis,

There are not many moments that go by that I don't think of you. You are so missed by many but especially Dad and myself. I love you tons and please give mom a big hug and kiss from me. I am glad the two of you are keeping each other company. Thank you for being my brother!

Sending you much love,
Margaret

October 23, 2018

Dennis I think of you often your birthday is coming up I'm still looking for that 30pack with 31 in it ... Happy Birthday in heaven my friend

John Cahalane

February 28, 2018

Very very sorry to hear of the sudden passing of Dennis. My thoughts and prayers are with ye all at this time. I'm sorry I was unable to attend the funeral mass. God bless you all. May he Rest In Peace.

February 22, 2018

To Eileen, Pat and Margaret,

My deepest sympathy,

Brigid Dineen, Millstreet, Co Cork.

Susan Jackson

February 20, 2018

RIP Dennis and prayers for your family in their time of grief. See ya on the other side....Susan Kositzin Jackson

Theresa-ann Pavlakovic

February 20, 2018

I will miss you and kno you are always in my heart.

February 20, 2018

Our prayers are with you Denny, your family and friends. You are loved and will now be missed by all whose life you touched. Cheers to you! Buff & Pat

Ashley

February 19, 2018

Dennis, greatest man i have ever met! He was there for a lot of us, him probably not knowing the impact he had on such abundance group of people. Dennis made a HUGE impact on our lives and he will always be remembered, especially the laugh and smile. Miss you already, one day we will reunite! <3 Much love.

February 19, 2018

My condolences to the O'Sullivan, Villalobos, Becker, McSweeney and Murray families. "...may the Lord of peace himself give you peace"...

Jenny Lua

February 18, 2018

Dennis at the placed he loved, The R Ranch by the Lake

Jenny Lua

February 18, 2018

Brian Moger

February 18, 2018

Rest In Peace Denny. Thanks for all the laughs.

Debbie Raffaelli

February 18, 2018

Margaret and family...sending our love and hugs over the unexpected loss of your brother/son). There are no words to truly console such a loss. We just pray all your wonderful memories will lessen the hole in your heart and create treasures that can bring a smile to your face❤ All our love, Bryan and Debbie Raffaelli

Mary Plunkett

February 18, 2018

Dennis you are going to be missed by way more people then you can imagine. You have touched all of us in so many different ways. I always looked forward to coming in to work the morning after you clean my back room to see how high you stacked the pallets. That was your (denny) way of saying hi.
Troy, Kyle, and myself will miss you greatly.

Jacqueline Gough

February 18, 2018

My Love to all the friends and family who have such sorrow at this time. May Dennis rest in peace

Brenda. @ Mike Hanes

February 17, 2018

Miss you my friend.

Sue Norman

February 17, 2018

I am so heart broken, prayers to his family and friends, I have known this man since we were 18, of all places Towing. He is my daughters God Father, she as well is so heart broken. All the great times at the R Ranch, the bars in San Francisco, watching my kids grow up from the time I was pregnant, I am so so sorry, He was the greatest man anyone could know, he will surely be missed. Rest In Paradise Dennis until we meet again.

We Love You Dennis

Sue, Courtney and Doug

Brenda Hanes

February 17, 2018

Dennis you are so missed my friend I can still hear you saying it don't get no better ...and on those slow days this is stealing we're going to jail. Love and miss you

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