Jobs in the United States

25+ jobs

Added 1 min ago
Cloud Engineer Senior w/Secret Clearance
TekSynap
Radford, VA
Understanding of core IT components including networking, storage systems, server infrastructure, and application architectures.
Added 1 min ago
Senior UNIX System Engineer w/Secret Clearance
TekSynap
Radford, VA
Five (5) years as a UNIX Systems Administrator or IT Engineer, including task automation.
Added 1 min ago
Senior Windows Administrator w/Secret Clearance
TekSynap
Radford, VA
Five (5) years as a Windows Systems Administrator or Engineer, including 3 years of task automation using PowerShell.
Added 1 min ago
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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
Test Engineer TS SCI
Northrop Grumman
Stafford, VA
Northrop Grumman, Defense Systems, is seeking an Associate Test Engineer to work on the Whisper program in Stafford, Virginia. The Whisper program is a large Antenna based RF Transmission…
Added 1 min ago
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BAS/BMS Controls Engineer
Carrier
Glen Allen, VA
- $64,500 to $129,500 USD / year
As a Controls Engineer, you will be crucial to ALC’s business through the designing of advanced building automation systems created specifically for each individual customer. We are looking…
Added 1 min ago
Space Systems Engineer Level 3 or 4
Northrop Grumman
Dulles, VA
Northrop Grumman Space Systems seeks a Systems Engineer Level 3 or 4 to join our team in Dulles, Virginia.
Added 1 min ago
Mission Account Director, Department of War
ServiceNow, Inc.
Vienna, VA
It all started when engineer Fred Luddy wrote code that automated a tedious task for his coworker, Phyllis. She cried tears of joy. That moment inspired Fred to build a company that could…
Added 1 min ago
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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
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Facilities Mechanical Engineer - HSC
Howmet Aerospace
Hampton, VA
- $90,000 to $115,000 USD / year
Understanding of hydraulic, pneumatic, and electrical control systems in a diverse industrial environment
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Cloud Cyber Engineer (Linux)
CACI International
Sterling, VA
Coordinates with appropriate Security Control Assessors (SCAs) early in engineering design phase for ongoing coordination, understating in development and application of security controls,…
Added 1 min ago
Full Stack Software Engineer/Developer
CACI International
Sterling, VA
Experience with version control systems (e.g., Git).
Added 1 min ago
Staff Principal Systems Engineer 5
Northrop Grumman
Charlottesville, VA
Northrop Grumman is seeking a Staff Principal Systems Engineer Level 5 to join our team of qualified, diverse individuals. The Marine Systems organization, part of Northrop Grumman Mission…
Added 1 min ago
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Command & Telemetry (C&T) Engineer (ND2) (Government)
AT&T
Chantilly, VA
- $89,200 to $180,000 USD / year
AT&T has an opening for a Command &Telemetry (C&T) Network Engineer. The C&T Network Engineer is a technical role which includes solution and design engineering functions for government…
Added 2 mins ago
Senior Director Digital Native, Customer Engineering
Cloudflare
Austin, TX
…companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by…
Added 2 mins ago
Sr. Controls Engineer, Data Center, Colocation Regional Engineering - AMER
Amazon
Herndon, VA
As a Controls Colo Engineer, you will work with internal business teams and with colocation vendors to identify, document, and resolve any operational/design deficiencies which could impact…
Added 2 mins ago
Senior Electrical Engineer, Data Center Engineering - Electrical Products and Services (DCE-EPS)
Amazon
Herndon, VA
…complex networks? Amazon is looking for a Senior Electrical Engineer to take on a technical leadership role in the design, architecture, and continuous improvement of our data center…
Added 2 mins ago
Data Engineer 4 (Python, AWS, SQL, GenAI) (Enterprise Platforms Technology)
Capital One
McLean, VA
Influence a team of developers, data analysts and data scientists with deep experience in machine learning, distributed microservices, lakehouse architecture, and full-stack systems
Added 2 mins ago
Global Red Team Senior AI Engineer, Vice President
MUFG Bank, Ltd.
Jersey City, NJ · Tempe, AZ
Ensure red team activities align with enterprise risk, regulatory expectations, and control‑validation objectives.
Added 2 mins ago
Lead Software Engineer
Highmark Health
Richmond, VA
The job is an integral member of an agile software engineer team responsible for building scalable software applications across all digital channels to serve our customers. The position…
Added 2 mins ago
Associate Software Engineer
Highmark Health
Richmond, VA
This job is an integral member of an agile software engineer team responsible for building scalable software applications across all digital channels to serve our customers. Responsible for…
Added 2 mins ago
Senior Telecom Engineer
Maximus
Richmond, VA
Maximus is seeking an experienced Senior Telecom Engineer to lead the design, implementation, and optimization of Genesys Cloud solutions. This role is responsible for executing large-scale…
Added 2 mins ago
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Sr Solution Consultant
Honeywell Technologies
Richmond, VA
- $115,000 to $164,000 USD / year
As a Senior Application Systems Engineer, you will play a critical role in designing, developing, and validating building automation and energy management solutions across the United…
Added 2 mins ago
Operations Analyst (Engineer Systems 2) - 31025
HII
Virginia Beach, VA
…This position provides Tactical Data Link (TDL) and Command, Control, Communications, Computers, and Intelligence (C4I) engineering support, ensuring the successful integration,…
Added 3 mins ago
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Maintenance Technician - B Shift
Aerotek
Bloomingdale, GA
- $65,000 to $75,000 USD / year
Perform repair and installation of parts, machines, and equipment, including bearings, gears, power components, and various drive and control systems.

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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