GRAPHICAL NETWORKS - Key Persons


Adrian Arlettaz

Job Titles:
  • Designer
  • Professor of Aesthetics Spain about Adrian Adrian
Adrian Arlettaz Designer Professor of aesthetics Spain About Adrian Adrian is in charge of the brand and software's graphical design - from the icons we use Adrian is in charge of the brand and software's graphical design - from the icons we use to logos, to corporate imagery, and much more. After studying graphic design at Palermo University, in Buenos Aires, Adrian worked as a professor. Since 2000, he has spearheaded numerous successful design

Adriana Lora

Job Titles:
  • Sales Associate
  • Member of Our Sales Team
Adriana is a member of our sales team; from coordinating events to ensuring our client accounts get the white glove service they deserve, Adriana's the glue that keeps the pieces together! Well-versed in CRM tools, project management, and event planning, Adri studied public communications and marketing at American University. Prior to joining the Graphical Networks team, she worked in marketing and administrative roles in addition to owning and running a business focused on organic bath and body products.

Brad Irvin

Job Titles:
  • Software Engineer
Brad is a software engineer at Graphical Networks; he joined the team in 2021. Currently, he works on customer-specific projects, import/export functions, and custom interfaces. Brad's career has been defined by IT visualization: he was one of a few key developers of netViz, which, in its time, was the only alternative to Visio (and the predecessor to all other IT visualization tools). He has worked as the Principal Software Engineer for CA Technologies and Concord Communications. Brad calls beautiful Germantown, Maryland home - a high-tech hub close to our headquarters (Gaithersburg, MD) that has some of the most beautiful parks and orchards in the state.

Danil Serov

Job Titles:
  • Software Engineer
Danil is a software engineer who joined the GN team in 2021: he works primarily on The Collector (netTerrain's discovery engine) and specializes in protocols such as SNMP. Danil earned his degree in Electrical Engineering from the National Research University of Electronic Engineering. After graduation, he went on to work as a software engineer, previously working for Axxonsoft - during his tenure there, he developed a video surveillance system. Danil lives in Isparta, Turkey. Famous for its rich history, Isparta's also known as "The City of Roses" - a nod to its incredible roses and rosewater exports. When Danil's not at work, he enjoys spending time studying the fascinating world of cats (which has recently usurped his lifelong interest in fish and aquariums).

Diego Rojas

Job Titles:
  • Lab Specialist
Diego joined GN in 2021 and immediately started building our expansive new telecom lab (used for our growing discovery and monitoring needs). Before GN, Diego worked in the core networking field auditing, designing, configuring, and maintaining cellular and IP networks for large telecom operators such as Claro and Globalcom. Diego earned his Electrical Engineering degree in 2009; he's currently finishing a postgraduate degree in Cloud computing. He lives in Maryland with his wife. In his free time, enjoys honing his soccer skills or discovering the Mid Atlantic region.

Dmitry Kornilov

Job Titles:
  • Principal Engineer
Passionate about IT visualization, Computer Vision and Machine Learning algorithms, Dmitry advises and guides Graphical Networks across a wide range of subjects including software, technology, and processes. Prior to GN, Dmitry worked at Nokia, Finland and was engineering manager at Computer Associates and is also a technical co-founder of Ditto.com. Dmitry holds a Ph.D. in Math and Physics from Saint Petersburg State Polytechnical University and is proud to call Silicon Valley home.

Fred Koh

Job Titles:
  • Founding Member
  • President / Sales & Operations
Fred is a founding member of Graphical Networks. He heads the sales and day-to-day operations for the company. Previously, Fred worked at Concord Communications, later acquired by CA,Inc. leading the sales initiatives with the entire netViz software portfolio, a network documentation package. Before Concord Communications, Fred held positions at both Verizon Business (MCI Worldcom at that time) and Savvis Communications. A ‘trekkie for life', Fred lives in Maryland and, in addition to being the only person rooting for the Nats at Graphical Networks, he is a die-hard Redskins fan.

Hannah Ash

Job Titles:
  • Marketing Specialist / Marketing and Influencer Gal
Hannah heads up marketing for Graphical Networks - from overseeing the website to overall messaging and brand awareness. An experienced marketer and corporate copywriter, she is a graduate of Roger Williams University. Since her early days visiting the now-defunct computer museum in Boston to the present, Hannah has been as as passionate about technology as she now is about marketing it. Hannah lives just outside of Boston, has never declined a cup of coffee in her life, and has somehow never been to a Red Sox game.

Hernán López Manilo

Job Titles:
  • Quality Assurance / QA & UX Savant / Spain
Hernán leads the quality assurance processes for all Graphical Networks products, including the design, documentation and execution of tests. In his quest for the perfect UX, he also supports the design team. Hernán received his education from the Universidad Católica de Salta in Buenos Aires. Before joining GN, he did testing for Reason (a leading music production software package) as well as network and systems administration. When not working on making netTerrain better each day, Hernán is a professional DJ and producer with a record label and vinyl shop in Madrid.

Ivan Zholudev

Job Titles:
  • Senior Software Engineer
Ivan joined the Graphical Networks team in 2011, working on the development of the original visualization engine. Currently, he spearheads the API development as well as several special projects, including: licensing, authentication, reporting, and more. Ivan began his career in IT visualization when he worked on the Irkutst Aviation Plant in 1999 for a joint project with Delcam PLC, a UK company (later purchased by Autodesk). Ivan is a computer science and mathematics graduate from Irkutsk State University. Ivan enjoys traveling and has acquired an impressive list of places he has visited.

Jan Dürnhöfer

Job Titles:
  • CEO / Product
As a founding member of Graphical Networks, Jan's mission is to make netTerrain the de-facto IT visualization software.

Jason Sherman

Job Titles:
  • Director of Customer Support
As a founding member of Graphical Networks and Sales and Support Director, Jason leads the pre and post sales cycle with the entire netTerrain software portfolio, ensuring current customers are able to use the software to its fullest potential. Jason previously worked at netViz as Pre Sales Manager and at Concord/CA as IT director. He holds a B.S. in Business Management from the University of Maryland and has been in the software industry for over 20 years. Jason is proud to call Maryland home (and, unlike Fred and Jack, is rooting for the Orioles).

John Justice Evans

Job Titles:
  • Junior Engineer
Justice is a cyber-security geek on an eternal mission to improve his knowledge, and in turn, better protect networks everywhere. In his role at Graphical Networks, Justice is responsible for log monitoring, server maintenance, and SQL database monitoring. Before joining the netTerrain team, and while pursuing his degree, he worked as a Linux tutor and served as an active member of Montgomery College's cyber-security club. Justice spends most of his free time studying for certifications and taking care of his two loveable huskies.

Marina Berhantsikova

Job Titles:
  • Modeling Expert

Martin Koen

Job Titles:
  • Web Developer
Martin joined Graphical Networks in 2021; he's our resident web developer in charge of our corporate site, SaaS portal, and other web-related projects.

Mauricio Gil

Job Titles:
  • Software Engineer
Mauricio joined the GN team in 2022 as a software engineer: his work centers around creating new connectors that facilitate the visualization of data from third-party systems in netTerrain. Mauricio previously worked in finance - and eventually made the leap into the world of Fintech. Prior to joining the GN team, he helped develop various billing and accounting systems. Mauricio hails from Argentina - specifically, San Miguel de Tucumán. It's a "very hot city" - literally: the average temperature during its winter months is 70° F! When he's not making netTerrain great, you'll find him either hiking or reading anything from horror to philosophy.

Nadia Sharabarova

Job Titles:
  • Principal Engineer
Nadia serves as the principal engineer for Graphical Networks: she has been an integral member of the team since 2012. If you use any netTerrain product, you are probably running her code. A computer science and mathematics graduate from Irkutsk State University, Nadia is known for her ability to figure out anything and everything. When Nadia is not busy perfecting netTerrain, she can be found winning hands at poker or embarking on another adventure around the globe. She plans to add Antarctica to her list one of these days.

Pablo Gioda

Job Titles:
  • Software Engineer
A member of GN's software engineering team since 2021, Pablo's current area of focus is working on netTerrain's discovery engine (The Collector) with an emphasis on its AWS integration. A developer since 2005, Pablo earned his degree in Systems Engineering from the Universidad Tecnológica de Córdoba. Prior to joining the Graphical Networks team, he worked for Motorola and numerous healthcare organizations. Pablo lives in Almafuerte, Cordoba - near one of Argentina's most beautiful lakes. The only Argentinian that does not love soccer, in his free time, you can find him cycling up the sides of mountains.

Rodrigo Leivas

Job Titles:
  • Channel & Product Manager
Rodrigo heads channel management efforts at Graphical Networks - including the partner programs for all non-English speaking countries. Additionally, he supports product management: in this capacity, he guides the ongoing success of netTerrain's discovery engine, The Collector. After obtaining his degree in electrical engineering from Belgrano University in Buenos Aires, and his MBA from CEMA University, Rodrigo worked at Telecom Argentina and Comsat where he led the sales initiatives for the data center and communications portfolio. When Rodrigo's not working, he can often be found on the golf course, attempting to better his game (or professing his allegiance to Boca Juniors).

Sergey Surkov - CTO

Job Titles:
  • CTO
  • Co - Founder of DITTO
An engineer turned technology entrepreneur, Sergey is our overall thinker when it comes to visualization, technology, and engineering management. Prior to his work with Graphical Networks, Sergey worked both at Google as an engineer in web search and at netViz where he led the development of the company's flagship enterprise data visualization software. Sergey is also a co-founder of DITTO, an eCommerce company with proprietary virtual fitting technology. He lives in the heart of California's Silicon Valley.