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About Us

Engineering Excellence & AI-Driven Automation

Spectrum Effect was founded by the wireless industry veterans behind Eden Rock Communications (SON leader acquired by a tier-1 OEM) with technologies incubated in advanced research projects with the United States Department of Defense and the Office of Naval Research. Spectrum Effect has pioneered highly innovative machine learning based analytics of mobile network data for RF interference mitigation.

Our mission is to solve the most challenging and costly problems in the wireless industry through innovation and automation. With R&D in Kirkland, Washington USA and Monterrey Mexico, we are passionate about the creation of disruptive technologies, engineering excellence in the development of our solutions and delivering substantial value to our customers.

Spectrum Effect has created Spectrum-NET, the industry’s leading solution for the automated analysis of RF interference. Protected by 30 issued patents, Spectrum-NET is enabling operators across the globe are rapidly address RF interference, improve network KPIs, surgically deploy their field assets, gain insights into spectral efficiency, and save significant OPEX and CAPEX.

Meet Our Team

The Spectrum Effect leadership team has deep experience building AI-based wireless solutions for the leading operators around the world.

Charles Immendorf, CEO

Charles Immendorf


Charles Immendorf is an entrepreneur and veteran of the wireless industry with an established track record of creating and commercializing high-value innovations. Under Charles’ leadership, Spectrum Effect has become a leader in AI-driven automation for mobile operators. Prior to Spectrum Effect, Charles was the Co-Founder and CEO of Eden Rock Communications and Head of SON at Nokia, which created the industry’s top Self Organizing Network (SON) software solution and became the market leader. Charles previously served as an R&D leader at AT&T, Motorola, and SR Telecom. Charles has been granted 22 US patents and received a BS in Electrical Engineering from Rutgers University.

Eamonn Gormley, CTO

Eamonn Gormley


Eamonn Gormley has 25+ years of leadership and expertise in the creation, development, and deployment of wireless communications solutions. As CTO, Eamonn leads the algorithm design and architecture teams for Spectrum-NET. Eamonn previously served as CTO at Eden Rock Communications and Head of Eden-NET SON Architecture at Nokia, where he led the design and development of Eden-NET. Eamonn held the positions of Director of Technology at SR Telecom and DSP Software Manager for AT&T’s OFDM broadband products program. Eamonn has been granted 81 US patents and he received a B.Eng. degree in Electrical Engineering from the University of Limerick, Ireland.

Jake Yun, Spectrum Effect Chief Scientist

Jungnam “Jake” Yun

Chief Scientist

Jake Yun leads advanced research, data science, and system design for Spectrum-NET. Prior to joining Spectrum Effect, he was a Principal Engineer with Eden Rock Communications and Nokia, where he conducted research in the spectrum sharing space and designed SON modules for Eden-NET. Before Eden Rock, he was with JUNI, where he designed MAC/SON algorithms for Mobile WiMAX and LTE small cells, and with POSDATA, where he designed WiMAX PHY/MAC algorithms. He has been granted 24 US patents and has authored several journal and conference papers. He received B.S. and M.S. degrees from KAIST and Ph.D. from Pennsylvania State University, all in Electrical Engineering.

Chance Mannina, Spectrum Effect CRO

Chance Mannina

Chief Revenue Officer

Chance is a 25+ year veteran of the communications industry focused on bringing creative solutions to market. In his role as Chief Revenue Officer, Chance leads worldwide sales, all aspects of go-to-market, and sales operations. Prior to Spectrum Effect, Chance was a founding CRO for B-Yond, an award-winning AI based network customer experience software platform, as well as SVP of Global Sales for Netcracker, where he led them from a startup through the acquisition by NEC. Chance has a dual B.S. in Marketing and Business Administration from Louisiana State University as well a graduate education in Entrepreneurship and Global Business Administration from Babson University.

Debby Toye, Spectrum Effect CFO

Debby Toye

Chief Financial Officer

Debby Toye is responsible for accounting, finance, and HR at Spectrum Effect. She has extensive experience in business and financial management of technology groups with demonstrated leadership in startups and scale-ups. Prior to Spectrum Effect, Debby was CFO at Eden Rock Communications and Business Operations Manager at Nokia. She previously served as CFO at Opanga Networks and in management positions at SR Telecom, IBM, and Bank of Montreal. Debby holds an MBA and B.Eng. in Chemical Engineering from McGill University in Montreal, Canada, and is a Certified Public Accountant in the State of Washington.

Anthony Wong, Spectrum Effect Chief Architect

Anthony Wong

Chief Architect

Anthony Wong possesses 20+ years of software design experience, with a focus on scalability and performance. Anthony leads the software architecture for Spectrum-NET. Prior to Spectrum Effect, Anthony was Chief Software Architect at Eden Rock Communications and Principal System Architect at Nokia, where he led the architecture design of the Eden-NET SON solution. Anthony previously served in senior software engineer positions at AT&T and Peerless Systems. He has been granted 8 U.S. patents and holds a B.S. degree in Computer Engineering from the University of Washington.

Jorge Webb, VP Engineering Services & Customer Support

Jorge Webb

VP Engineering Services and Customer Support

With 20+ years of experience supporting and collaborating with mobile operators on emerging technologies, Jorge Webb leads Spectrum Effect’s RF Systems Analyst, Global Technical Support, and DevOps teams. Jorge previously served as the VP of Engineering Services at Eden Rock Communications and Head of SON Engineering Services at Nokia. Before Eden Rock, Jorge served as Director of Customer Solutions at SR Telecom and Systems Engineer at Lucent Technologies. He holds a B.S. in Electronic and Communications Engineering from the Technology Institute of Advanced Studies in Monterrey, Mexico.

Jina Choi, Director of Product Management

Jina Choi

VP Product Management & Development

Jina Choi focuses on solving problems and delivering value to customers. In her current role at Spectrum Effect, Jina leads the product management, software development, and software quality assurance teams. Prior to working for Spectrum Effect, Jina held various roles in product management, operations, and finance at Fluke (a Fortive operating company), McMaster-Carr and JP Morgan. Jina received an MBA from Harvard Business School and a BA in Economics from the University of Chicago.

Board of Directors

Scot Jarvis

Scot Jarvis


Scot Jarvis co-founded Cedar Grove Partners, a private equity firm with a focus on wireless communications, in 1997 after a highly successful career in management and investment roles in the wireless communications industry. A graduate of the University of Washington, Scot founded and served as the first President of Nextlink Communications, served as a Regional President of Nextel, and served as a Senior Executive with McCaw Cellular (now AT&T Wireless). He has served or currently serves on the boards of public and private companies, including Airspan, Conner Homes Group, Kratos Defense and Security Solutions (KTOS), MobiTV, RootMetrics, Slingshot Sports, Toba Inlet PCS, and Vitesse Semiconductor (VTSS). Scot also serves as a Venture Partner for Oak Investment Partners focusing in the wireless communications market.

John Saw

John Saw

Board Member

John Saw, Ph.D., FCAE, is T-Mobile’s executive vice president & chief technology officer leading Core & Technology Development. In this role he leads a diverse team responsible for end-to-end network growth and evolution as well as outstanding customer experiences.

Previously John was executive vice president of advanced and emerging technologies at T-Mobile, where he and his team of brilliant technologists constantly looked for new and innovative ways to disrupt wireless and bring a little joy to customers’ lives.

Before joining T-Mobile, John was the chief technology officer at Sprint, where he transformed its network performance and oversaw the company’s 5G rollout. John was also the chief technology officer at Clearwire before the company was acquired by Sprint in 2013. Long recognized as a pioneer in the 2.5 GHz band, he’s led the development of the 2.5 GHz band into one of the most valuable mid-band spectrums in the U.S. and one of the largest ecosystems in the world.

Joseph P. Landy

Joseph P. Landy

Board Member

Joseph P. Landy, recently retired Partner and Co-Chief Executive Officer of Warburg Pincus, engaged in all aspects of private equity investing from 1985 until 2020. During his tenure, Mr. Landy co-led the firm’s Executive Management Group, formulated strategy, provided oversight of investment decisions and grew the firm’s private equity assets under management to $56 billion. Mr. Landy’s principal areas of investment focus have been information technology, Internet applications and infrastructure, communications applications and structured investments. Mr. Landy is on the board of trustees of New York University, serving as Chair of the Investment Committee. He is also a board member of Fountain House, the National Park Foundation and several privately held companies. Mr. Landy has previously served as a board member of CrowdStrike, Neustar Inc., Covad Communications, Avaya Holdings Corp. and Bausch & Lomb Inc. Mr. Landy holds a B.S. degree in Economics from The Wharton School at the University of Pennsylvania and an M.B.A. from The Leonard N. Stern School of Business at New York University.

Kishen Mangat

Kishen Mangat

Board Member

Kishen Mangat is General Partner at Boulder Ventures (BV) where he leads the firm’s enterprise 5G investment strategy. One of the rocky mountain region’s most tenured venture capital partnerships, BV raised its eighth fund in 2022. Prior to BV, Kishen spent nine years at Cisco Systems as VP/GM for Mobility, Automation, Internet-of-Things and Open Radio Access Network (ORAN). Prior to Cisco, Kishen co-founded multiple startups, including BroadHop, Inc., where he developed the go-to-market, field sales and support operations. BroadHop was acquired by Cisco Systems in 2013. Kishen received his B.A. in Economics from Colorado College.

Bruce Brda

Bruce Brda

Board Member

Bruce Brda is the retired Executive Vice President, Products & Solutions, for Motorola Solutions where he was responsible for development of the company’s mission-critical communications portfolio. In this capacity, Bruce served on the company’s executive committee, ensured strong alignment between the company’s vision, strategy and portfolio execution and contributed to more than a 200% increase in shareholder value. From 2014 through early 2019, Bruce led the company’s product management, engineering, procurement, corporate strategy organization, CTO and venture capital organizations. Brda joined Motorola in 1989 where he held a variety of leadership roles in sales, engineering and business development across several Motorola business units. He managed the go-to-market function for key regions in Motorola’s Mobile Devices business and also led the global sales organization. In 2009, he led Motorola’s Networks business and guided its sale to Nokia Siemens Networks. Brda was then tapped to lead Motorola’s newly created Solutions & Services business. Prior to joining Motorola, he worked as director of engineering for Dukane Corporation and as a design engineer for Northrop Corporation. He earned a bachelor’s degree from Southern Illinois University and a master’s degree from Illinois Institute of Technology. He previously served on the Board of Eden Rock Communications prior to its acquisition by Nokia.

Gary Sledge

Gary Sledge

Board Member

Gary is the President of Kellett Investment Corp where he manages a large portfolio of diverse investments including real estate, investments in private companies and hedge funds. His 30+ years of financial and operations experience includes serving as Chief Financial Officer of Impac Hotel Group, one of the largest hotel companies in the US, and Technology Ventures, an incubator of several early stage technology companies. Before this, Gary held various leadership roles with The Ritz-Carlton Hotel Company and Johnstown American Companies. Gary holds a BBA Business Administration with a Major in Accounting from Georgia State University.

C. James Judson

In Memory

C. James Judson

Chairman and Co-Founder
1944 – 2018

Jim was a retired senior partner at a prominent Seattle-based law firm and board member and co-founder of Spectrum Effect. Jim was previously Chairman and co-founder of Eden Rock Communications, VP at Eagle River Investments, Founding President at McCaw International/Nextel International and Founding President at McCaw UniCom Shanghai JV. Jim’s extensive experience in the wireless industry led to his development of some of the world’s largest cellular operators. Jim served on the boards of China Unicom, Nextel International, NextLink, Lumera, Port Blakely Tree Farms, Garrett and Ring, Joshua Green Corporation, Welco Lumber, Airbiquity, Sonata Capital, TUPL, Opanga, Seattle Institute for Biomedical and Clinical Research, Aubeta and TSK America. Jim also served on the Boards of Trustees of the Pacific Northwest Ballet Foundation, the Yosemite National Institutes, the Pacific Science Center and the Washington Athletic Club. Jim attended Stanford University, B.A. cum laude 1966, and Stanford Law School, LLB. 1969 and was Executive Editor of the Stanford Law Review.

Spectrum Effect is grateful to Jim for the vision, guidance, and invaluable contributions to our success. Jim was a leader, a mentor, and a good friend. The Spectrum Effect team will honor Jim’s legacy by working diligently to bring his vision to reality.

Ready to see Spectrum-NET in action?

Learn how the world’s leading mobile operators are using Spectrum-NET to drive RF interference mitigation, improve network performance, and maximize spectral efficiency.
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