Plains All American Pipeline and Plains GP Holdings Announce Appointment of New Chief Operating Officer
Key Highlights
- ➤Dean Liollio appointed EVP and COO effective October 2, 2026
- ➤Chris Chandler resigns as EVP and COO to pursue other interests
- ➤Liollio previously served as Plains Midstream Canada president
- ➤Plains (PAA) chairman, CEO and president praised Liollio’s qualifications
Expert Statements
Willie Chiang, Chairman, CEO and President of Plains
“We congratulate Dean on his promotion to the EVP and COO role. Dean is immensely qualified to take on this key leadership role as he has been a member of our executive committee and has been instrumental in executing on our recent initiatives.”
Willie Chiang, Chairman, CEO and President of Plains
“I would also like to thank Chris for his many contributions to Plains and wish him the best in his future endeavors.”
HOUSTON, Sept. 29, 2026 (GLOBE NEWSWIRE) -- Plains All American Pipeline, L.P. (Nasdaq: PAA) and Plains GP Holdings (Nasdaq: PAGP) (collectively, “Plains”) announced that Dean Liollio has been appointed to serve as Executive Vice President and Chief Operating Officer of Plains effective as of October 2, 2026. Mr. Liollio replaces Chris Chandler, the current EVP and COO, who is resigning from Plains to pursue other interests and not due to any disagreement relating to the company’s operations, policies or practices.
Mr. Liollio, age 67, served as Senior Vice President, Special Projects, of Plains from June 2024 until his appointment as EVP and COO in October 2026. He previously served as President of Plains Midstream Canada from 2020 until 2024, as President of PAA Natural Gas Storage from 2008 until 2020 and as President of Plains Gas Solutions from 2016 until 2020. Prior to joining Plains in 2008, Mr. Liollio held a number of executive roles including serving as President, Chief Executive Officer and Director of EnergySouth, Inc. and as President and Chief Operating Officer of Centerpoint’s natural gas distribution operations across a five-state area including Houston. Mr. Liollio holds a Bachelor of Science degree in Industrial Engineering from Texas A&M University.
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