Zachary L Rosenbaum

Senior Engineering Advisor

About

Zach Rosenbaum is a Principal in DLA Piper's Telecom Practice, where he serves as a senior engineering and technical advisor on complex matters involving terrestrial and satellite systems, spectrum sharing, and emerging telecom architectures. At DLA Piper, his work focuses on integrating rigorous engineering analysis directly into legal and policy advocacy, supporting clients in high‑stakes proceedings before the Federal Communications Commission (FCC) and in international fora.

In his role, Zach regularly develops and reviews licensing narratives, technical annexes, and waiver requests for a variety of technologies operating across the entire radio spectrum. His work includes the preparation technical analyses, often relying on complex simulations to evaluate interference risk, compliance pathways, and spectrum‑sharing scenarios. He is routinely responsible for translating complex engineering results into clear, persuasive regulatory prose that support client objectives in licensing and rulemaking proceedings. His work often involves developing technically grounded arguments that balance spectrum efficiency with interference protection. He also advises on the technical dimensions of transaction‑driven regulatory reviews, including transfer‑of‑control analyses and market‑access considerations.

Internationally, Zach is deeply engaged in spectrum and space governance matters, with hands‑on involvement in International Telecommunication Union (ITU) and World Radiocommunication Conference (WRC) matters. He supports the preparation and review of technical submissions to ITU‑R Working Parties addressing spectrum sharing and regularly advises clients on ITU engagement strategies. His work frequently spans cross‑border coordination issues involving multiple administrations and operators, requiring both technical fluency and sensitivity to international dynamics.

Zach's work at DLA Piper also focuses on advanced data analysis and tool development in support of legal outcomes. He designs and applies data‑driven engineering analyses using public data to assess interference scenarios, coordination obligations, and compliance risk. He has contributed to the development of AI‑enabled and automated research tools and plays an active role in integrating engineering workflows into the firm’s broader AI and analytics initiatives.

Through this work, Zach regularly supports leading telecom operators, technology companies, and industry associations on matters involving licensing and modification, satellite‑terrestrial spectrum sharing, ITU and WRC‑related advocacy, space sustainability and orbital‑debris compliance, and emerging hybrid telecom architectures. His practice is defined by the application of deep technical analysis to complex regulatory problems, enabling clients to navigate evolving spectrum and space policy environments with confidence.

Zach is not a lawyer.

EXPERIENCE

Simulated projects independent of the platform used for the model:

  • Ability to analyze and process terrestrial mobile broadband data
  • Analysis of satellite-to-cellular and other non-terrestrial networks (NTN) connectivity
  • Satellite downlink interference into fixed terrestrial receivers
  • Terrestrial wireless interference into receive only C-band satellite earth stations
  • Satellite earth station interference into aeronautical receivers
  • NGSO interference into GSO satellite networks
  • Various direction-finding algorithms (DS beamforming, MUSIC, Capon)
  • Monte Carlo simulations on a digital communication system to determine BER
  • Filter design and implementation
  • Detection and estimation problems and implementation of Viterbi algorithm
  • Channel equalization problems using adaptive and non-adaptive techniques
  • NGSO orbital propagators for NGSO-to-NGSO and NGSO-to-GSO interference calculations
  • EPFD mask generator and interpreter
  • EPFD simulator
  • Antenna modeler for phased array earth stations to determine uplink EPFD compliance
  • Interference modeling to determine compatibility with 5G and compliance with FCC rules
  • Out-of-band emission analysis to determine compliance with EESS (passive) systems

Awards

The Legal 500 United States

  • Recommended, Telecoms & Broadcast: Regulatory (2024)
Education
  • M.B.A., George Washington University
  • M.S., Villanova University
  • B.S., University of Pittsburgh

Bylines

  • "3D Classification of Through-the-Wall Radar Images Using Statistical Object Models," Dr. Bijan G. Mobasseri, Zachary Rosenbaum, IEEE Southwest Symposium on Image Analysis and Interpretation (SSIAI), Santa Fe, New Mexico, 2008
  • "Interpretation of Through-the-wall Radar Imagery by Probabilistic Volume Model Building," Zachary Rosenbaum, Dr. Bijan G. Mobasseri, SPIE Defense + Security Conference, Orlando, Florida, 2008

Prior Experience

In 2008, Zach started his career as a spectrum engineer at SES Americom (in Princeton), where he established foundations in frequency allocations and technical requirements for satellites operating at the geostationary orbit in planned and unplanned frequency bands. He was relocated to Den Haag in The Netherlands to globalize his perspective on international frequency allocations and policies in Europe, Africa, the Middle East and Asia. During this time, he gained experience in the ITU structures and working methods including the WRC. 

After returning to the US, Zach joined EchoStar Satellites in the Advanced Programs and Spectrum Development team working on S-band and DTH technologies. He later joined O3b Networks in Washington DC where he led the team to maintain and develop spectrum assets and defend from 5G spectrum encroachment in core satellite bands. When SES fully acquired O3b, he was promoted to vice president of spectrum management and development for the Americas and NGSO at SES.

Zach’s research experience includes investigating radar images of urban environments for purposes of classification of objects through the wall. He conducted these experiments using real radar data conducted in MATLAB for the Villanova University, Center for Advanced Communications.

Zach is fluent in a broad range of software programs, such as Satsoft, Matlab, Visualyze, Python, ITU BR Software, and FCC databases and software.

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