Oil and gas
10 ExxonMobil operations leaders
These ten people hold or have held director, vice president and senior vice president operations roles at ExxonMobil, across global refining and chemical operations, midstream, upstream and regional operations. A reader can learn how ExxonMobil organizes, runs and improves operations across a worldwide network of plants and assets.
Professionals to explore
01—10Carman Mullins
LinkedInExperience: Vice President Upstream Operations · ExxonMobil
Former Vice President Upstream Operations at ExxonMobil (2021–2023), in Houston, and Vice President Global Projects at ExxonMobil since October 2022. Carman Mullins was also ExxonMobil Canada President (2017–2019) and Senior General Manager at ExxonMobil (2015–2017).
Cory Quarles
LinkedInExperience: Upstream Operations Vice President · ExxonMobil
Former Upstream Operations Vice President at ExxonMobil (2025–2026), and Midstream Operations Vice President at ExxonMobil since April 2026. Cory Quarles was also XTO Vice President at ExxonMobil (2023–2025) and President & CEO of SeaRiver Maritime, Inc (an ExxonMobil Subsidiary) (2018–2021).
Dave Brownell
LinkedInExperience: Senior Vice President Global Operations · ExxonMobil
Former Senior Vice President Global Operations at ExxonMobil (2018–2022), responsible, according to the profile, for global refinery and midstream operations across the fuels and lubricants value chains. Dave Brownell was also Vice President Downstream Business Development & Portfolio Mgt (2014–2017) and Antwerp Refinery Manager (2012–2014) at ExxonMobil.
Glenn Hayes
LinkedInExperience: Vice President Global Operations - North America · ExxonMobil
Vice President Global Operations - North America at ExxonMobil since July 2026, in Houston. The profile also lists Integrated Complex Manager at ExxonMobil in Baytown from August 2025, and Refinery Manager (2025), Baytown Chemical Plant Manager (2023–2025) and Global Project Development Manager (2022–2023).
Janet Matsushita
LinkedInExperience: Senior Vice President of Global Operations - Product Solutions Company at ExxonMobil · ExxonMobil
Senior Vice President of Global Operations - Product Solutions Company at ExxonMobil since April 2022, and Senior Vice President of Global Operations - ExxonMobil Fuels & Lubricants Company (2021–2022), a role the profile says covered refining and midstream global operations across the Downstream. Janet Matsushita was also EMEAP Refining Director (2016–2022).
Jason Duncan
LinkedInExperience: Senior Vice President Global Operations · ExxonMobil
Senior Vice President Global Operations at ExxonMobil since March 2025, in Houston. Other ExxonMobil roles include Americas Manufacturing Director, ExxonMobil Product Solutions (2022–2025), Americas Manufacturing Director, ExxonMobil Chemical (2021–2022), Plant Manager, Baytown Olefins Plant (2018–2021) and Plant Manager, Beaumont Polyethylene Plant (2015–2018).
Joe Blommaert
LinkedInExperience: Senior VP Global Operations, Chemicals · ExxonMobil
Former Senior VP Global Operations, Chemicals at ExxonMobil (2019–2021) and former Director, Asia and Europe Chemical Manufacturing at ExxonMobil (2014–2019). Joe Blommaert was also President, ExxonMobil Low Carbon Solutions (2021–2022), and the profile headline describes Joe Blommaert as a retired former ExxonMobil president.
Monica Mainland
LinkedInExperience: Director, Global Operations, Operations Enablement & Improve · ExxonMobil
Director, Global Operations, Operations Enablement & Improve at ExxonMobil since July 2026, in Houston. The profile also lists Director, Operations Systems & Improve from 2023, and Asia Pacific Manufacturing Director (2022–2023), Asia-Pacific Chemical Regional Director (2021–2022) and Refinery Manager (2016–2021) at ExxonMobil.
Robert Johnston
LinkedInExperience: Vice President Of Global Operations · ExxonMobil Product Solutions
Former Vice President Of Global Operations at ExxonMobil Product Solutions (2022–2026), a final assignment the profile describes as leading pipeline, terminal and lubricant blending operations globally across 30 countries and 150+ locations. Robert Johnston was also Senior Vice President Global Operations (2021–2022) and Manufacturing Director Asia Pacific (2019–2021) at ExxonMobil.
Wim Blokker
LinkedInExperience: Vice President International - Global Operations · ExxonMobil
Vice President International - Global Operations at ExxonMobil since July 2026, in Brussels. Other ExxonMobil roles include Regional Director Europe - Global Operations ExxonMobil (2025–2026), Plant Manager Baytown Chemical Plant (2021–2025), Plant Manager Mont Belvieu Plastics Plant (2019–2021) and Global Manufacturing Support Manager (2017–2019).
Choose the right perspective
Match the person to the part of the value chain behind your question, since refining and chemical plant operations, pipelines and terminals, and upstream production are run by different organizations. Check whether the relevant role is current or past before asking how ExxonMobil operates today.
Questions to take into the conversation
- 01How does ExxonMobil set and review operating performance targets across refineries and chemical plants in different regions?
- 02What are the tradeoffs of running refining, chemical and logistics operations as one global operations organization rather than as separate businesses?
- 03How do ExxonMobil operations leaders decide where to invest in reliability and maintenance across a large asset base?
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot and may describe past or present roles. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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