Jeffrey Mack

Chemical process engineer with experience in pharma CDMO, specialty chemicals, renewable fuels, and refining. Delivered quantified results at CITGO, including $6M waste-processing savings and $200k/year additive optimization, plus Aspen modeling, turnaround execution, and commercial-scale trials. Targeting process engineering roles in chemical and pharmaceutical manufacturing.

Process Engineer at Siegfried (2025-05 – Present)

• Support pharmaceutical CDMO manufacturing: batch process troubleshooting, tech transfer, and process changes with operations and quality to cGMP expectations.

Implementation Manager; Engineer II at Ecolab (2023-01 – 2025-05)

• Implementation Manager (2024–2025): Led process and chemical-program implementation, coordinating operations, technical, and plant stakeholders through start-up and handover.
• Engineer II (2023–2024): Plant process engineering at a chemical manufacturing site — troubleshooting, reliability, product quality, and day-to-day production support.

Operations Engineer at Amp Americas (2022-07 – 2023-01)

• Supported operations engineering for renewable natural gas production, including process troubleshooting and operating-performance follow-up.

Process Engineer — Coker, Blending & Design at CITGO (2019-07 – 2022-07)

• Delayed Coker (2021–2022): Optimized distillation, heater run-length, heat exchangers, and compressor reliability; coordinated a hazardous-waste test run saving $6 million; developed chemical-cleaning scope for the Summer 2022 turnaround.
• Blending & Transfer (2021): Led MOC and tank-maintenance support covering hydraulics, relief protection, and logistics; optimized gasoline and diesel additive rates saving $200k+/year; improved level-gauge PM to reduce overfill risk.
• Process Design (2019–2021): Modeled distillation and heat-exchanger performance in Aspen for operations and capital projects; night-shift lead for HF Alkylation chemical cleaning, inspection, and QA/QC; issued PSV specifications and administrative controls.

Intern at Ecolab (2018-01 – 2018-12)

• Developed a fluorescent-imaging method for protein on dishware; optimized presoak cleaning-capacity tests.

Process Engineer Co-op at Kimberly-Clark (2017-01 – 2017-12)

• Coordinated commercial-scale trials for Cottonelle and Scott launches; documented process risks from trial data.

Intern at Spectrum Brands (2016-01 – 2016-12)

• R&D support for the air-diffusion layer of a zinc-air battery and cost-improvement work.

Bachelor of Science in Chemical Engineering – University of Wisconsin–Madison (2014-01 – 2019-12)