The Principal Design Engineer leads the design, qualification, and lifecycle support of high-performance coaxial, twisted-pair, twinaxial, fiber-optic, Power over Ethernet (PoE), Single Pair Ethernet (SPE), Class 4 power, and hybrid cable products. This role converts customer and market requirements into reliable, manufacturable, standards-compliant solutions while partnering closely with Product Management, Applications Engineering, Manufacturing, Quality, suppliers, and customers.

• Lead new product development and sustaining engineering projects for coaxial, twisted-pair, twinaxial, fiber-optic, power, and hybrid cable constructions.
• Apply electromagnetic and optical transmission theory to conductor geometry, dielectric systems, shielding, cabling, fiber selection, and termination design.
• Develop and validate designs through calculations, modeling, prototypes, design reviews, and laboratory testing.
• Document design assumptions, risks, tolerances, and acceptance criteria.
• Direct product development priorities aligned with business strategy and product roadmaps.

• Design and qualify products to applicable TIA-568, ISO/IEC 11801, SPE, Industrial Ethernet, Telcordia, NEMA, ICEA, UL, and CSA requirements.
• Support ISO 9001 and ISO 14001 systems, along with material-compliance obligations including RoHS, REACH, Proposition 65, PFAS, TSCA, CMRT, and EMRT.
• Define qualification and production test methods, equipment, fixtures, sampling plans, and acceptance criteria.
• Review industry codes and standards and represent MIEI at industry and agency meetings.
• Support Marmon Electrical businesses in maintaining and developing industry standards.

• Serve as a subject matter expert in the transmission cable 5Ms:
  • Materials
  • Manufacturing Methods
  • Machines
  • Measurement/Certification
  • Manpower/Training
• Partner with manufacturing facilities and suppliers to resolve material, equipment, process, testing, certification, quality, and performance issues.
• Translate designs into manufacturable products, including process windows, inspection requirements, and testing criteria.
• Support root-cause analysis, corrective actions, and CAPEX planning related to product design requirements.

• Manage projects utilizing Stage-Gate/New Product Development processes and continuous improvement methodologies.
• Maintain accurate product information within CableBuilder, Smartsheet, Axiom, QCBD, ISOVISION, and other company systems.
• Ensure specifications, drawings, test plans, and engineering changes are accurate, traceable, and released on schedule.

• Provide technical training related to cable construction and termination principles for internal teams and customers.
• Support customer troubleshooting, technical reviews, product qualifications, and field issue resolution.
• Assist with R&D planning and budget management aligned with strategic business initiatives.

The responsibilities listed above are not intended to be an exhaustive list. Additional duties may be assigned based on business needs.

Required

• Bachelor's degree in Electrical Engineering, Optical Engineering, Physics, or a related technical field.
• Minimum of five years of experience in cable design, transmission-line/RF propagation, data communications, or fiber-optic product development.
• Experience designing and qualifying cable products.
• Experience interpreting specifications, engineering drawings, test data, and industry standards.
• Experience supporting manufacturing operations, suppliers, engineering change control, Stage-Gate/NPD programs, and cross-functional teams.

Preferred

• Master's degree in Electrical Engineering, Optical Engineering, Physics, or related field.

• Knowledge of electromagnetic and optical transmission theory, RF theory, signal integrity, and cable materials/construction.
• Familiarity with RF, high-speed data, and optical qualification and production testing methods.
• Proficiency with engineering calculations, cable design software, laboratory tools, and modeling applications.
• Ability to balance performance, compliance, manufacturability, quality, cost, reliability, schedule, and technical risk.
• Strong written, verbal, project management, training, and cross-functional leadership skills.
• Continuous improvement mindset with excellent judgment and attention to detail.
• Ability and willingness to travel as required.