Chemical Engineer · cover letter
[Date]
Dear [Hiring Manager],
When a reaction step at our plant was running below spec and capping output, I led the troubleshooting, ran a design-of-experiments study on temperature and catalyst loading, and raised yield from 82 to 91 percent. That change added roughly 1.5 million dollars of annual product capacity with no new capital. That is the kind of process work I want to bring to [Company].
For the past five years I have worked as a process engineer in continuous chemical manufacturing, owning unit operations, running mass and energy balances, and using statistical tools to separate real process signals from noise. I write and revise operating procedures, support process hazard analyses, and treat safety as a design constraint, not paperwork. After a near-miss on a relief system, I led the corrective action that re-rated the relief path and closed the gap before it could become an incident.
What I value is rigor that holds up on the floor. I validate a change with data before scaling it, I document the basis so the next engineer understands why, and I work shoulder to shoulder with operators because they see things a model does not. I am comfortable with process simulation, P&ID work, and root-cause investigation.
Most postings for this kind of role describe a reaction step quietly running below its designed yield without ever naming the number, and a design-of-experiments study on the variables nobody has touched recently is where I would start. That is the same approach that took yield from 82 to 91 percent without new capital.
Sincerely,
[Your Name]
[Phone] | [Email]