At Quartermaster AI, we believe the ocean should be a safe and sustainably managed resource for all. By leveraging cutting-edge AI and robotics, we unlock capabilities that were only recently impossible. Our distributed open-ocean systems enable every vessel to sense, compute, and communicate, enhancing maritime domain awareness for those who need it most.
Role Overview:Quartermaster AI is seeking an experienced RF Signals Analyst with deep technical roots in communications and signals analysis and characterization to lead our signal characterization and data labeling efforts.
This role focuses on turning real world RF sensor data into structured ground truth for machine learning. You will analyze maritime RF events using spectrograms, waterfall plots, PSDs, metadata, and contextual sources like AIS and camera data when available. You will help define signals of interest, identify interference and host-platform noise, and label signals consistently for model development.
This is a hands-on technical role spanning RF analysis, data labeling, and ML dataset creation, with close collaboration across DSP and ML teams.
Key Responsibilities:Analyze RF event data using IQ derived representations such as spectrograms, waterfall views, PSDs, and metadata to identify, classify, and tag signals of interest.
Help define and maintain a scalable maritime RF labeling taxonomy, including signal classes, confidence levels, rejection categories, and ambiguity handling.
Build and refine high quality labeled datasets for machine learning, ensuring labels are technically defensible, consistent, and auditable.
Identify and document recurring host vessel interference, platform artifacts, and environmental noise to support rejection library development.
Collaborate with DSP and ML engineers to review false positives, false negatives, and edge cases, and improve labeling standards over time.
Use available contextual data such as AIS, camera imagery, collection metadata, and sensor state to support signal interpretation when appropriate.
3+ years of experience in one or more of the following: RF signal analysis, SDR-based signal review, EW/SIGINT/ELINT analysis, RF dataset creation, or technical signal characterization.
Practical experience working with RF data products such as IQ captures, spectrograms, waterfall plots, PSDs, or other time frequency representations.
Experience working with structured labeling, annotation, classification, or technical review workflows where consistency and traceability matter.
Comfort working in a Linux-based environment using Python, SDR tools, notebooks, or other RF analysis environments to inspect, organize, and process signal data.
Ability to communicate clearly with engineers and translate signal observations into actionable labeling guidance.
Experience in maritime RF environments or other cluttered, interference heavy operational environments.
Understanding of how label quality, taxonomy design, multi-sensor context (for example AIS, EO/IR, or geolocation), and rejection categories affect downstream ML training and evaluation.
Active clearance or ability to obtain and maintain a Secret clearance.
What We Do
Quartermaster AI leverages cutting-edge AI and robotics to create distributed open-ocean systems that enhance maritime domain awareness. Their systems enable vessels to sense, compute, and communicate, aiming for a safe and sustainably managed ocean.
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