Lead RF Systems Engineer (Tactical Comms SDR DSP)

At Two Six Technologies we build deploy and implement innovative products that solve the worlds most complex challenges today. Through unrivaled collaboration and unwavering trust we push the boundaries of whats possible to empower our team and support our customers in building a safer global future.

Overview of Opportunity

Two Six Technologies is seeking a Lead RF Systems Engineer to lead technical strategy and software development for DSP/SDR tactical communications this role you will drive architecture design advanced algorithm development testing and hardware-in-the-loop validation to support cutting-edge R&D programs in Herndon Virginia. As a lead / principal engineer you will serve as a technical authorityshaping modern RF architectures guiding lab infrastructure strategy selecting core SDR platforms and mentoring multi-disciplinary engineering teams. The primary focus of this role is terrestrial communications systems RF signal reverse engineering tactical waveform synthesis and electronic warfare (EW) resilient communications across HF VHF and UHF bands.

What you will do (Responsibilities):

• Lead Architecture & Strategy: Architect design and implement advanced SDR and DSP solutions for terrestrial tactical radios (HF/VHF/UHF) in a Linux environment.
• Protocol & Waveform Reverse Engineering: Reverse engineer complex terrestrial COTS and proprietary RF devices to map transceiver logic demodulate legacy/custom tactical waveforms and extract framing parameters.
• Waveform Synthesis & Generation: Synthesize and generate custom tactical RF waveforms based on reverse-engineered signal parameters including frequency-hopping direct-sequence spread spectrum (DSSS) and low probability of intercept/detection (LPI/LPD) signals.
• Terrestrial Signal Processing: Develop algorithms to detect identify feature-extract and decode captured complex tactical communications signals operating in harsh multipath and co-channel interference environments.
• Modulation & Transceiver Pipeline: Implement end-to-end transmit/receive signal chains using foundational and complex modulation schemes (e.g. FSK PSK QAM).
• Lab Leadership & Testing: Direct laboratory build-outs select advanced SDR hardware and test gear and execute field or lab-based RF experimentation to validate synthesized tactical signals.
• Domain Problem Solving: Solve high-level technical challenges across tactical communications signal intelligence (SIGINT) spectrum management and electronic warfare (EW/EA/EP) domains.
• Technical Mentorship & Expertise: Serve as a subject matter expert (SME) in HF/VHF/UHF propagation signal generation and DSP guiding cross-functional teams in a rapid-prototyping environment.

What you will need (Basic Qualifications):

• Active DoD Top Secret clearance with SCI eligibility required
• Degree in Computer Engineering Electrical Engineering Mathematics Physics Computer Science or equivalent practical military or intelligence community experience.
• Minimum 8 years of hands-on experience in Digital Signal Processing (DSP) Software Defined Radio (SDR) and RF communications development (including technical lead/architecture roles).
• Deep knowledge of terrestrial RF communications systems channel dynamics and signal structures across the HF VHF and UHF bands.
• Extensive experience in RF reverse engineering signal parameter estimation protocol disassembly and target waveform regeneration.
• Proven track record architecting software-driven DSP pipelines (C Python GNU Radio or REDHAWK) with an emphasis on real-time signal processing.

Nice if you have (Preferred):

• Tactical Radio Protocols: Familiarity with modern military and public safety tactical radio standards waveforms and networking protocols (e.g. MIL-STDSTANAG SINCGARS HAVE QUICK P25 MANET/mesh networking).
• Propagation & Channel Modeling: Strong understanding of terrestrial RF phenomena including ground-wave/sky-wave HF propagation urban multipath fading troposcatter and Doppler spread mitigation.
• Advanced EW & Anti-Jamming: Experience with Electronic Warfare (EW) countermeasures anti-jam (AJ) techniques LPI/LPD waveform design and adaptive filtering/interference mitigation.
• Firmware Analysis: Experience with reverse engineering tools like Ghidra IDA Pro or binary analysis frameworks for embedded tactical radio firmware.
• Communications Theory: Deep expertise in FEC (Convolutional Turbo LDPC) Viterbi/Reed-Solomon decoding interleaving frame synchronization and equalization algorithms.

Security Clearance:

• Active DoD Top Secret clearance with SCI eligibility required.

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