Sr. Signal Integrity Engineer

Molex; Lisle (IL); On-site; USD 110,000 - 150,000; Full time

Job summary

Molex is seeking a Senior Signal Integrity Engineer to lead measurement, analysis, and validation of high-speed interconnects, including connectors and cable assemblies. You will drive SI test development and mentor technicians while contributing to global engineering initiatives.

Reporting to the Senior Principal SI Engineer, you will work autonomously to advance test methods, prototype validation, and lab capability improvements, ensuring products meet customer, regulatory, and industry

Qualifications

• Master's degree or Ph.D. in Electrical Engineering or a related field.
• 8+ years of experience in high-speed signal integrity design, testing, and validation.
• 5+ years designing, characterizing, and evaluating high-speed connectors, cable assemblies, and interconnect systems.
• Strong foundation in electromagnetic field theory, microwave engineering, transmission line theory, shielding concepts, and high-speed interconnect behavior.
• Extensive experience performing signal integrity testing, shielding testing, and characterization using TDR/TDT, VNA, oscilloscope, and BERT.
• Hands-on lab experience in measurement-driven engineering environments and leading projects.

Responsibilities

• Perform high-speed electrical measurements including insertion loss, return loss, crosstalk, eye diagrams, BER, and shielding leakage.
• Evaluate the signal integrity and shielding of connectors and interconnect systems for new product development and manufacturing validation.
• Support product development through electromagnetic simulation and modeling to predict SI and shielding performance.
• Analyze and interpret S-parameters, TDR/TDT waveforms, shielding measurements, and time-/frequency-domain responses.
• Develop and execute signal integrity and shielding test methodologies aligned with standards and customer requirements.
• Design, implement, and maintain test automation solutions using Python, MATLAB, or similar.
• Lead troubleshooting and root-cause analyses of SI- and shielding-related issues.
• Mentor engineers and technicians, promoting laboratory best practices and technical excellence.

Skills

High-speed SI design

Measurement & analysis

S-parameter analysis

TDR/TDT testing

VNA & BERT techniques

Automation with Python

MATLAB scripting

Leadership & mentoring

Education

Master's or PhD in Electrical Engineering

Tools

TDR/TDT

VNA

Oscilloscope

BERT

Python

MATLAB

Touchstone SnP

Job description

Your Job

We are seeking a highly skilled Senior Signal Integrity (SI) Engineer to lead the measurement, analysis, and validation of high-speed digital and RF interconnects, including connectors, cable assemblies, and related interconnect systems.

This role is critical to advancing the standardization of global SI laboratories and ensuring optimal signal integrity and shielding performance across a broad range of Molex products and applications. Responsibilities include evaluating and characterizing connectors, cable assemblies, and interconnect systems, with a focus on component performance, mated-interface performance, assembly characterization, shielding effectiveness, and the correlation of measured results with customer, regulatory, and industry requirements.

Reporting to the Senior Principal Signal Integrity Engineer, you will operate with a high degree of autonomy, driving signal integrity test development, mentoring laboratory engineers and technicians, and contributing to global engineering initiatives. You will play a key role in prototype validation, test methodology development, and the continuous enhancement of laboratory capabilities.

What You Will Do

• Perform high-speed electrical measurements, including insertion loss, return loss, crosstalk, mode conversion, characteristic impedance, skew, propagation delay, eye diagrams, BER, and shielding leakage using VNAs, TDR/TDT systems, high-speed oscilloscopes, and BERTs.
• Evaluate the signal integrity and shielding effectiveness of connectors, cable assemblies, interconnect systems, and communication channels for new product development and manufacturing validation.
• Support product development through electromagnetic simulation and modeling to predict signal integrity and shielding performance.
• Analyze and interpret S-parameters, TDR/TDT waveforms, shielding measurements, and time- and frequency-domain responses.
• Develop, validate, and execute signal integrity and shielding test methodologies aligned with industry standards, customer requirements, and regulatory specifications.
• Design, implement, and maintain test automation solutions using Python, MATLAB, or similar programming languages.
• Analyze test data to identify design improvements and optimize product performance.
• Lead troubleshooting efforts and root-cause analyses of signal integrity- and shielding-related issues.
• Collaborate with design, simulation, and system engineering teams to optimize overall product performance.
• Perform channel characterization and link analysis for high-speed SerDes systems.
• Validate product performance against specifications across a wide range of high-speed signaling technologies.
• Stay current with industry advancements and emerging technologies while leading internal signal integrity technology development initiatives.
• Mentor engineers and technicians, promoting laboratory best practices and technical excellence throughout the organization.

Who You Are (Basic Qualifications)

• Master's degree or Ph.D. in Electrical Engineering or a related field.
• 8+ years of experience in high-speed signal integrity design, testing, and validation.
• 5+ years of experience designing, characterizing, and evaluating high-speed connectors, cable assemblies, and interconnect systems.
• Strong foundation in electromagnetic field theory, microwave engineering, transmission line theory, shielding concepts, and high-speed interconnect behavior.
• Extensive experience performing signal integrity testing, shielding testing, and characterization of high-speed connectors, cable assemblies, and interconnect systems using TDR/TDT, VNA, oscilloscope, and BERT measurement techniques.
• Strong analytical and troubleshooting skills with extensive hands-on laboratory experience in measurement-driven engineering environments.
• Demonstrated success leading technical projects, mentoring engineers and technicians, establishing laboratory best practices, and contributing to technology roadmaps.

What Will Put You Ahead

• Working knowledge of Power Integrity (PI) and EMI/EMC principles.
• Experience with electromagnetic simulation and modeling to predict signal integrity and shielding performance.
• Understanding of SerDes architectures, channel characterization techniques, equalization concepts, and high-speed link analysis.
• Experience with test automation, scripting, and data management systems.
• Experience with fixture removal and de-embedding techniques using SI data analysis tools and Touchstone (SnP) data formats.
• Experience designing high-speed test fixtures and test boards.
• Familiarity with high-speed modulation formats, including PAM4, PAM6, and PAM8.
• Knowledge of applicable industry standards and specifications, including USCAR, Open Alliance, PCIe, Ethernet, USB, DDR, IEC, EIA, and CXL.
• Ability to translate complex technical data into clear, actionable engineering recommendations.
• Demonstrated commitment to continuous improvement and technical excellence.

For this role, we anticipate paying $110,000 - $150,000 per year. This role is eligible for variable pay, issued as a monetary bonus or in another form.

At Koch companies, we are entrepreneurs. This means we openly challenge the status quo, find new ways to create value and get rewarded for our individual contributions. Any compensation range provided for a role is an estimate determined by available market data. The actual amount may be higher or lower than the range provided considering each candidate's knowledge, skills, abilities, and geographic location. If you have questions, please speak to your recruiter about the flexibility and detail of our compensation philosophy.

Our Benefits

Our goal is for each employee, and their families, to live fulfilling and healthy lives. We provide essential resources and support to build and maintain physical, financial, and emotional strength - focusing on overall wellbeing so you can focus on what matters most. Our benefits plan includes medical, dental, vision, flexible spending and health savings accounts, life insurance, ADD, disability, retirement, paid vacation/time off, educational assistance, and may also include infertility assistance, paid parental leave and adoption assistance. Specific eligibility criteria is set by the applicable Summary Plan Description, policy or guideline and benefits may vary by geographic region. If you have questions on what benefits apply to you, please speak to your recruiter.

Equal Opportunities

Equal Opportunity Employer, including disability and protected veteran status. Except where prohibited by state law, some offers of employment are conditioned upon successfully passing a drug test. This employer uses E-Verify. Please click here for additional information. (For Illinois E-Verify information click here, aqui, or tu).