Mark E. Castello

Mark E. Castello, 64, of Muscatine, passed away on Monday, August 22, 2022, at the University of Iowa Hospitals and Clinics.

Visitation will be from 4 until 6 p.m. on Friday, August 26, 2022, at the Ralph J. Wittich-Riley-Freers Funeral Home. Online condolences may be made at

Mark was born on September 27, 1957, in Iowa City, the son of Anthony and Edith Siperly Costello.

Mark made his career at MPW in several positions retiring as Operations Supervisor after 37 years in 2016.  He never let his day job limit his lifelong ambitions of adventure on the high seas.  He can be attributed to building bridges, underwater construction, nuclear reactor construction (Mason Jars and Spaghetti Noodles), Captaining the Pearl Button Paddle Wheel boat, entrepreneurship, and creating memories for all.

Captain Mark Costello, admired by many and loved by all who were lucky enough to know him. A pirate at heart, who blessed many lives both on land and sea. His adventures took him from Iowa to the Bahamas, the Philippines to Alaska, and many more destinations around the world. Along the way he was always surrounded by friends that quickly became his family, who he treasured with all his heart. His passion to work and dedication to his family and friends never wavered; even in his weakest moments he was the strongest man in the world. His legacy will live on through all that have had a chance to feel the impact of THE CAPTAIN MARK COSTELLO.

“In life there are a lot of moments and then those moments become your life.” – Capt. Mark

“Hero’s get remembered, but legends never die” – The Sandlot.

He is survived by Mary Costello their two sons, Matt Costello and Alli of Muscatine, and Mike Costello and Noel of Bettendorf, and two grandchildren, Aiden and Madelyn Costello.

Mark is preceded in death by his parents; stepfather Victor Bill; and siblings Bill Kahl, Jim Kahl, and Tony Costello.

There will be a private family tree planting ceremony at a later date.