Experienced Air-Cooled Transformer Engineer

Macro Magnetics offers a collaborative, integrity-driven culture that values innovation and quality. The company serves customers with industry-leading water-cooled transformers for resistance welding, glass manufacturing, and industrial furnaces. This hybrid role in Grand Haven, Michigan, provides the chance to influence design from concept through production while enjoying a robust benefits package and opportunities for professional growth.

Benefits

• 401(k)
• Dental insurance
• Employee assistance program
• Flexible schedule
• Health insurance
• Health savings account
• Life insurance
• Paid time off
• Professional development assistance
• Referral program
• Retirement plan
• Tuition reimbursement
• Vision insurance

Who is Macro Magnetics?

Macro Magnetics is founded on integrity, innovation, and quality, recognizing the contributions of its team members and customers. The company designs and manufactures water-cooled transformers for key markets, including resistance welding, glass manufacturing, and industrial furnaces.

What you will be doing

• Design and engineer air cooled transformers from concept to production, addressing electrical, thermal, mechanical, and insulation-system factors.
• Develop designs that meet customer specifications, performance targets, cost goals, safety standards, and manufacturability needs.
• Perform electrical design calculations for voltage, current, turns ratio, impedance, losses, efficiency, regulation, temperature rise, short-circuit withstand, and duty-cycle performance.
• Select core materials, conductor types, insulation systems, winding configurations, cooling methods, termination arrangements, and mechanical support structures.
• Prepare and review engineering drawings, bills of materials, design documentation, test requirements, and production support materials.
• Provide technical guidance to manufacturing teams on winding, assembly, insulation, brazing/soldering, core assembly, impregnation, and final testing.
• Troubleshoot transformer performance issues such as overheating, noise, vibration, insulation failures, loss deviations, dielectric failures, and customer application concerns.
• Participate in design reviews, root-cause analysis, corrective actions, and continuous improvement initiatives.
• Collaborate with sales, applications engineering, quality, purchasing, production, and customers to ensure designs are technically sound and commercially practical.
• Review customer specifications and advise on feasibility, risks, exceptions, alternate designs, and compliance requirements.
• Support transformer testing, including routine, type, thermal, dielectric, impedance, no-load loss, load loss, and any special customer-required testing.
• Maintain knowledge of applicable standards such as IEEE, ANSI, UL, CSA, NEMA, IEC, and related transformer and electrical safety standards.

Requirements

• Bachelor’s degree in Engineering or a closely related technical discipline; equivalent practical transformer design experience may be considered.
• Minimum 7 to 10 years of experience designing, developing, or supporting air-cooled, dry-type, or custom transformers.
• Strong understanding of transformer electromagnetic design principles, including core flux density, winding current density, impedance, losses, regulation, and thermal performance.
• Experience with copper and aluminum windings, insulation systems, laminated cores, bus connections, terminals, cooling ducts, and mechanical clamping structures.
• Familiarity with transformer manufacturing processes and shop-floor constraints.
• Ability to interpret customer specifications, electrical schematics, mechanical drawings, test data, and applicable standards.
• Experience supporting production, quality, and field troubleshooting activities.
• Proficiency with engineering calculations, design tools, spreadsheets, CAD/ERP systems, and technical documentation.
• Strong analytical, problem-solving, and communication skills.
• Ability to manage multiple custom engineering projects simultaneously.
• Experience with high-current, low-voltage transformers, resistance welding transformers, furnace transformers, rectifier transformers, isolation transformers, control transformers, or specialty industrial transformers.
• Experience designing transformers for harsh-duty, intermittent-duty, high-temperature, or high-current applications.
• Knowledge of UL, CSA, IEEE, ANSI, NEMA, or IEC requirements for dry-type transformers.
• Experience with thermal modeling, finite element analysis, magnetic modeling, or transformer design software.
• Experience with vacuum pressure impregnation, varnish systems, encapsulation, or advanced insulation materials.
• Hands-on experience with prototype builds, production launches, and customer application reviews.
• Familiarity with lean manufacturing, design for manufacturability, and cost-reduction initiatives.

Technologies

• CAD/ERP systems

Location

Hybrid remote in Grand Haven, MI 49417