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CITGO Petroleum Corporation invites a Chemical Engineer intern to join our Lemont, IL or Downers Grove, IL refinery teams for a paid 12-week summer internship. You will assist with feasibility studies, economic analyses, process design, and equipment evaluation under senior engineers.
The program emphasizes refinery safety, hands-on project work, and a final presentation detailing intern accomplishments. Eligible students should be enrolled in an Electrical Engineering bachelor’s program,
CITGO Petroleum Corporation is a recognized leader in the refining industry and operates under the well‑known CITGO brand. CITGO owns and operates three refineries located in Lake Charles, LA.; Lemont, IL.; and Corpus Christi, TX, and wholly and/or jointly owns 43 active terminals, nine pipelines and three lubricants blending and packaging plants. With approximately 3,300 employees and a combined crude capacity of approximately 829,000 barrels-per-day (bpd), positions CITGO as one of the best-branded supplier companies in the industry.
At CITGO our people are our most important resource. Our core values are Safety, Integrity, Respect, Accountability, and Care.
The Chemical Engineer intern will become familiar with the refinery organization and work processes while learning refinery safe work practices. The intern will work on various projects throughout the refinery under the direction of a more senior engineer. This position is a paid 12-week summer internship. A presentation covering all aspects of the internship experience and accomplishments will be expected at the end of the term. Interns will be responsible for assisting with or performing engineering duties which may include: feasibility studies, economic analysis of projects, process design, equipment specification, evaluation and selection of equipment and materials. Monitor and troubleshoot process unit performance. Find and implement ideas to improve the profitability of various process units. This position is located on‑site in either Lemont, Illinois or Downers Grove, Illinois.
Pay Range: $27.14 - $36.19
Deadline to apply is September 30, 2026
CITGO Petroleum Corporation is a recognized leader in the refining industry and operates under the well‑known CITGO brand. CITGO owns and operates three refineries located in Lake Charles, LA.; Lemont, IL.; and Corpus Christi, TX, and wholly and/or jointly owns 43 active terminals, nine pipelines and three lubricants blending and packaging plants. With approximately 3,300 employees and a combined crude capacity of approximately 829,000 barrels-per-day (bpd), positions CITGO as one of the best-branded supplier companies in the industry.
At CITGO our people are our most important resource. Our core values are Safety, Integrity, Respect, Accountability, and Care.
The Chemical Engineer intern will become familiar with the refinery organization and work processes while learning refinery safe work practices. The intern will work on various projects throughout the refinery under the direction of a more senior engineer. This position is a paid 12-week summer internship. A presentation covering all aspects of the internship experience and accomplishments will be expected at the end of the term. Interns will be responsible for assisting with or performing engineering duties which may include: feasibility studies, economic analysis of projects, process design, equipment specification, evaluation and selection of equipment and materials. Monitor and troubleshoot process unit performance. Find and implement ideas to improve the profitability of various process units. This position is located on‑site in either Lemont, Illinois or Downers Grove, Illinois.
Pay Range: $27.14 - $36.19
Deadline to apply is September 30, 2026
Job duties displayed above are not all‑inclusive, site‑specific responsibilities may be assigned.
All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or disability.
Requisition ID - 2129