Principal Mixed‑Signal Hardware Engineer (Scientific Instruments)

Job Description

Job Description Principal Mixed‑Signal Hardware Engineer (Scientific Instruments)

Join LECO in St. Joseph, Michigan—an 80+ year, family‑owned innovator in world‑class laboratory instrumentation. We value long‑term stability, loyalty, trust, and shared purpose, and our products support scientists around the globe.

Schedule: Monday–Friday, 8:00 a.m.–5:00 p.m., on‑site

A day in the life

You’ll start your morning reviewing your engineering notebook and latest test data from a precision measurement board. By midday, you’re collaborating with mechanical and software peers to refine a subsystem architecture for a next‑generation instrument. In the afternoon, you’ll implement design updates, run bench evaluations, and capture findings for design reviews—operating with a high degree of technical independence throughout.

Role overview

As a senior engineer, you will own the design of advanced electrical components and sub‑assemblies with minimal oversight. You will report to the Manager, Electronics Research & Engineering, or the Manager, RF Products.

What you’ll own

• End‑to‑end design of electrical components and sub‑assemblies, from concept through release
• Researching, building, and testing prototypes to validate performance
• Diagnosing and resolving production issues in partnership with manufacturing
• Authoring and maintaining design artifacts (schematics, BOMs, specifications) and keeping a logbook
• Preparing documentation packages for formal design reviews
• Contributing within cross‑disciplinary teams while accounting for system‑level tradeoffs
• Investigating emerging technologies to drive product innovation
• Leading specialty electrical design efforts independently

What you bring

• Depth across a broad spectrum of electrical engineering topics, including:
  • Mixed‑signal design (ADC/DAC) for precision measurement systems
  • Microcontroller‑based hardware design
  • Analog circuit design
  • Closed‑loop temperature control
  • AC power design (single‑phase and three‑phase)
  • High‑voltage design (≥1 kV, typically low power)
  • Motor control
  • Human‑machine interface (HMI) design
  • System‑level architecture
  • PCB/PWB design and PWA practices
  • Wire harness design
• Clear written and verbal communication with strong documentation discipline
• Effective collaboration and facilitation skills; sensitivity to multi‑disciplinary stakeholder needs
• Awareness of design impacts across the broader team and product lifecycle

Education & experience

• Master’s degree, or Bachelor’s degree with substantial related experience
• 7+ years of relevant, hands‑on electrical engineering experience

Reporting

This role reports to the Manager, Electronics Research & Engineering, or the Manager, RF Products.

EOE M/F/Vet/Disability