Longtime Mobil Refinery Worker David J. Thomas Dies at 66

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David J. Thomas, a longtime employee at the Mobil Refinery in Joliet, Illinois, passed away peacefully at his home on March 7, 2026 at the age of 66. Thomas worked at the refinery for 37 years, spending the majority of his career as an Analyzer & Digital Systems Supervisor before retiring in 2014.

Why it matters

Thomas' passing marks the end of an era for the Mobil Refinery, where he dedicated the majority of his working life. His long tenure and various roles at the refinery highlight the importance of experienced workers in the energy industry.

The details

Thomas was born in Joliet in 1959 and grew up in the nearby town of Channahon. After graduating from Minooka Community High School in 1977, he went on to earn an Electrical/Electronic Automated Systems Degree from Joliet Junior College. Shortly after completing his studies, he was hired by the Mobil Refinery, where he worked until his retirement in 2014.

• David J. Thomas passed away on March 7, 2026.
• Thomas was born on October 26, 1959.
• Thomas graduated from Minooka Community High School in 1977.
• Thomas worked at the Mobil Refinery for 37 years, retiring in 2014.