Principal Design Engineer

Marmon Industrial Energy and Infrastructure, part of Marmon Holdings, offers a Principal Design Engineer role responsible for the design, development, validation, and lifecycle support of radio‑frequency (RF) coaxial cable, telecom, and fiber products used in wireless infrastructure applications such as DAS, public safety, and in‑building systems.

• Manage and prioritize all engineering efforts to align with and achieve the strategic objectives of the business unit.
• Direct development of new products utilizing the full capabilities of the MIEI group.
• Support Sales and Marketing by providing technical literature and design reviews.
• Review national and international codes and standards to ensure product compliance.
• Represent the Company at industry, trade, and agency meetings.
• Guide customers in the proper selection, use, and installation of RF coaxial cable, telecom, and fiber products.
• Direct troubleshooting efforts at the sales/customer level.
• Develop training programs for customers and internal personnel.
• Provide functional direction and supervision to the engineering group to ensure timely processing of orders and quotes and efficient operation of product manufacturing.
• Ensure engineering documents are timely, complete, accurate, and that specification‑related issues are resolved.
• Prepare the R&D budget aligned with long‑term strategic initiatives.
• Develop and manage execution of R&D activities aligned with long‑term product roadmaps.
• Support CAPEX plan development and 5M analysis for new equipment, including manufacturing and testing requirements based on product design.

These duties represent the general requirements of the Principal Design Engineer role and are not an exhaustive list. Additional responsibilities may be assigned based on business needs.

• Four‑year Electrical Engineering degree (Master’s preferred).
• Minimum of 5 years of related experience.

• Strong verbal and written communication skills across all organizational levels.
• Proficiency with lab and simulation software.
• Continuous improvement mindset with active participation in business advancement.
• Willingness to travel to customer locations.
• Strong managerial and communication skills.
• Knowledge of RF test methods, RF theory, passive and active RF systems, material science, and modeling and simulation of RF, fiber, and telecom cables.

• Ability to work long hours in a sedentary role involving sitting, talking, computer work, and repetitive motions.
• Ability to move objects and materials of at least 25 pounds.
• Ability to collaborate with manufacturing team members in potentially noisy environments.
• Ability to follow safety guidelines and wear required PPE when on the manufacturing floor.

We are an equal opportunity employer, and all applicants will be considered for employment without attention to their membership in any protected class. Following receipt of a conditional offer of employment, candidates will be required to complete additional job‑related screening processes as permitted or required by applicable law. If you require any reasonable accommodation to complete your application or any part of the recruiting process, please email your request to  and be sure to include the title and the location of the position for which you are applying.