Jobs in the United States

25+ jobs

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Propulsion Engineer, Sr Staff - SRM / Solid Rocket Motors - Remote Option
Lockheed Martin
Virtual Two, VA
We are seeking to hire an Aeronautical / Propulsion Engineer for the Propulsion team working a new development program. Our team delivers breakthrough missile propulsion solutions, driving…
Added 1 min ago
Mechanical Systems Engineering
L3Harris
Forest, VA
The Shipboard Systems Mechanical Engineer designs, tests, troubleshoots, and implements systems that satisfy specific customer requirements relating to a shipboard environment. These…
Added 1 min ago
Cloud Engineer Senior w/Secret Clearance
TekSynap
Radford, VA
We are seeking a Cloud Engineer Senior to join our team supporting an ITES task order.
Added 1 min ago
QA/QC Engineer
Bureau Vertias North America
VA
…performance, and execution of construction inspections and testing services which lead to the successful delivery of commissioning and turn-over for clients in the Hyperscale Data Center…
Added 1 min ago
VN
Project Engineer - Mechanical
Veolia North America
North Chesterfield, VA
- $104,000 to $119,000 USD / year
Project Engineer – Performs commissioning of mechanical systems. Must be a self-motivated & energetic professional. Must have understanding of building mechanical systems design,…
Added 1 min ago
C
BAS/BMS Controls Engineer
Carrier
Glen Allen, VA
- $64,500 to $129,500 USD / year
Support of functional testing for building systems.
Added 1 min ago
VN
Mechanical Commissioning Engineer (Data Center)
Veolia North America
Ashburn, VA
- $100,000 to $120,000 USD / year
Project Engineer – Performs commissioning of mechanical systems. Must be a selfmotivated & energetic professional. Must have understanding of building mechanical systems design,…
Added 1 min ago
HA
Facilities Mechanical Engineer - HSC
Howmet Aerospace
Hampton, VA
- $90,000 to $115,000 USD / year
Howmet Aerospace’s Hampton Structural Castings (HSC) is seeking a Facilities Mechanical Engineer who has a demonstrated ability to achieve results, as well as the passion to put that…
Added 1 min ago
Hardware Program Lead Sr Stf - E5
Lockheed Martin
Manassas, VA
Lockheed Martin is in search of an experienced Hardware Engineer for a technical lead role within the Undersea Mission Systems business area. This position is for the Hardware Lead Role on…
Added 1 min ago
Senior Front End Engineer
General Dynamics Information Technology
Fairfax, VA
Establish and champion frontend best practices including mobile-first development, testing strategies, performance optimization, accessibility standards, and code quality patterns
Added 1 min ago
Software Developer – Entry Level (Top Secret Clearance Required)
CGI Technologies and Solutions, Inc.
Fairfax, VA
As an Entry Level Software Developer, you’ll work with cross functional teams to design, build, test, and enhance technology solutions that address client needs. You’ll gain hands‑on…
Added 1 min ago
Environmental Program Leader – Hazardous Waste and Dangerous Goods Compliance
GE Aerospace
Charlottesville, VA · Glen Allen, VA
Success in this role requires a demonstrated ability to work across functional teams to achieve environmental and compliance objectives; strong problem-solving, project management,…
Added 1 min ago
Senior Specialist, Technical Trainer/ Mission Operations Trainer
L3Harris
Chantilly, VA
Job Title: Senior Specialist, Integration & Test Engineer
Added 1 min ago
Engineer IV
General Atomics
Herndon, VA
…architecture definition, FPGA design, schematic development, board functional testing, firmware development, and associated test-software…
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Technical Lead/Solution Architect
Guidehouse
MCLEAN, VA
…integration-layer delivery, legacy coexistence, data exchange, testing, deployment, security alignment, and operational…
Added 2 mins ago
AI-Native Software Engineer Advisor Senior
Elevance Health
Richmond, VA
The AI-Native Software Engineer Advisor Senior will be responsible for shipping, evaluating, securing, and supporting real systems. The ideal candidate is a strong engineer who has real…
Added 2 mins ago
Software Engineer 2
Humana
Richmond, VA
The Software Engineer 2 develops, tests, and maintains software applications that support business and technology objectives. The associate works on moderately complex assignments,…
Added 2 mins ago
Java Full Stack Engineer with Spring boot/AWS Experience
Cognizant
Richmond, VA
As a Java Full Stack Engineer with Spring boot/AWS exp, you will make an impact by designing and delivering scalable, cloud-native healthcare payer applications that improve payment…
Added 2 mins ago
Senior Engineer
PwC
Richmond, VA
As a Senior Engineer you will help design, build, and test custom applications within our Advisory practice, bringing together software engineering, cloud-based solution delivery, and…
Added 2 mins ago
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.NET Full stack Engineer with C#
Cognizant
Richmond, VA
- $86,000 to $99,000 USD / year
As a Senior Software Engineer , you will make an impact by designing, developing, and modernizing enterprise healthcare payer applications that support critical business functions including…
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Senior Lead Engineer
PwC
Richmond, VA
As a Senior Lead Engineer you will lead custom application development and testing efforts that help clients turn business needs into scalable software solutions across cloud-native and…
Added 2 mins ago
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.NET Full stack Engineer with C#
Cognizant
Richmond, VA
- $86,000 to $99,000 USD / year
As a Senior Software Engineer , you will make an impact by designing, developing, and modernizing enterprise healthcare payer applications that support critical business functions including…
Added 2 mins ago
C
.NET Full stack Engineer with C#
Cognizant
Richmond, VA
- $86,000 to $99,000 USD / year
As a Senior Software Engineer , you will make an impact by designing, developing, and modernizing enterprise healthcare payer applications that support critical business functions including…
Added 2 mins ago
EG
QA Automation Engineer
Eliassen Group
Richmond, VA
- $75 to $82 USD / hour
Our client seeks a QA professional to conduct functional testing, load testing, usability testing, continuous integration, and code reviews. The role will contribute to requirement…
Added 3 mins ago
A
Quality Engineer
Aerotek
Greenville, SC
- $80,000 to $100,000 USD / year
Job Title: Quality Engineer Job DescriptionThe Quality Engineer oversees the development, implementation, and continuous improvement of the companys quality management system to ensure…

Modem System Test Engineer - Wireless Technologies and Ecosystems |

CA, United States

The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

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Job details

Pay: The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.
Posting language: English
Posted: Nov 6, 2026

Original job description

Summary Join the Wireless Technologies and Eco-Systems (WTE) team and drive wireless innovations that impact millions of users worldwide! We design, validate, and integrate cutting-edge wireless technologies that enrich everyday experiences across our entire product ecosystem.

We are seeking a passionate, detail-oriented Modem Systems Test Engineer with a focus on Wireless Coexistence (COEX). In this role, you will be at the forefront of validating multi-radio platforms ensuring seamless concurrent operation between cellular technologies (LTE, 5G NR FR1/FR2) and adjacent radios such as Wi-Fi, Bluetooth, Ultra-Wideband (UWB), and GNSS. If you thrive in a fast-paced environment solving complex cross-radio interference, desense, and protocol arbitration challenges, we would love to hear from you.

Description In this role, you will be responsible for end-to-end system testing, performance characterization, and failure triage of advanced cellular baseband and multi-radio coexistence features. You will bridge baseband protocol software, RF hardware, and connectivity systems to guarantee robust real-world performance under hostile interference conditions.

You will rely on deep trace analysis, lab simulation, RF instrumentation, and automation to uncover edge-case performance degradation, desense mechanisms, and protocol timing collisions. Working cross-functionally with system architecture, firmware, protocol development, RF design, and carrier engineering, you will drive test coverage, root-cause complex issues, and influence system-level mitigation designs.

Responsibilities

Coexistence Test Design & Execution: Define, develop, and execute comprehensive test plans targeting in-device coexistence (IDC), inter-radio arbitration, multi-SIM / multi-active scenarios, and concurrent multi-band operation (LTE/5G NR with Wi-Fi, Bluetooth, UWB, and GNSS).

RF & Protocol Root-Cause Analysis: Analyze baseband protocol traces (PHY, MAC, RLC, PDCP, RRC), air-interface captures, and RF measurements to root-cause desense, throughput degradation, scheduling conflicts, dropped calls, and handover anomalies.

Mitigation & Feature Validation: Evaluate and validate dynamic coexistence mechanisms, including power back-off, time-division multiplexing (TDM) / frequency-division multiplexing (FDM) filtering, antenna switching/sharing, and adaptive link management.

Intelligent Test Automation: Develop robust, scalable test automation scripts and post-processing analytics pipelines in Python to automate test execution, KPI aggregation (BLER, throughput, latency), and anomaly detection.

Testbed & Environment Integration: Set up, calibrate, and maintain sophisticated lab testbeds incorporating cellular network emulators (call boxes), RF matrix switches, combiners, spectrum analyzers, and wireless channel emulators.

Cross-Functional Collaboration: Partner closely with baseband firmware, connectivity software, RF systems engineering, and hardware teams to reproduce lab/field defects, validate fixes, and verify 3GPP and internal performance specifications.

Minimum Qualifications Education: Bachelor’s or Master’s degree in Electrical Engineering, Computer Engineering, Telecommunications, or a related field.

Cellular Protocol Stack Expertise: Deep technical understanding of 3GPP LTE and 5G NR (Rel-15/16+) across Layer 1 (PHY), Layer 2 (MAC/RLC/PDCP), and Layer 3 (RRC/NAS).

Coexistence & RF Fundamentals: Strong grasp of RF transceiver architectures, in-device coexistence (IDC), antenna isolation, harmonics, intermodulation distortion (IMD), receiver desense, and multi-radio interference mitigation techniques.

Hands-on Validation Experience: Proven track record of system test, integration, or validation using commercial wireless network emulators (e.g., Keysight, Rohde & Schwarz, Anritsu) and RF instrumentation (spectrum analyzers, signal generators, power meters).

Automation & Scripting: Strong proficiency in Python for test automation, instrument control (SCPI/VISA), and automated parsing/analysis of large log datasets.

Analytical Problem Solving: Demonstrated capability to triage and root-cause multi-layer failures across hardware, firmware, and protocol interactions.

Preferred Qualifications Prior experience testing Dual-SIM / Dual-Active (DSDS/DSDA) or complex Cellular scenarios with simultaneous connectivity radios. Working knowledge of 3GPP in-device coexistence specifications (e.g., Rel-11+ IDC mechanisms, autonomous denial, auxiliary information reporting). Experience with non-cellular wireless standards (Wi-Fi 6/6E/7 - 802.11ax/be, Bluetooth 5.x, UWB, NFC, GNSS). Familiarity with data analysis and visualization libraries (Pandas, NumPy, Plotly/Matplotlib) for large-scale test KPI dashboards. Contributions to 3GPP standardization (RAN4, RAN5) or carrier certification testing for coexistence and performance. Proficiency in diagnosing complex system-level issues through lab/field experimentation, analytics, and log analysis. Excellent analytical & critical thinking skills, Excellent communication & interpersonal skills.

Pay & Benefits At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $150,400 and $277,600, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses - including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

EEO Statement Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant

Accessibility At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here - in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

Learn about accessibility in Apple’s workplace

Learn about reasonable accommodations for job applicants

Application Deadline Apple accepts applications to this posting on an ongoing basis.

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More about this job

Skills

Hardware testing methods
Firmware
Root cause analysis
Test automation
Python
Electrical engineering
Computer engineering
NAS
Problem solving
Reporting
Data analysis
NumPy
Critical thinking
Communication skills
Interpersonal skills

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