Our Team

Expertise + Passion = Great Software.

Adrian Arlettaz
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 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 projects with a focus on branding and artistic direction. Originally from Argentina, Adrian currently calls sunny Madrid home: when he’s not busy making netTerrain look fabulous, Adrian is an amateur DJ and, in his words, a “frustrated NBA player.”
DCIM Team Member
Hannah Ash

Marketing Specialist

Marketing and influencer gal

Rhode Island, US
About Hannah 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.
DCIM Team Member
Marina Berhantsikova

Modeling Expert

Keeper of the catalog

Armenia
About Marina Marina is in charge of the device, rack, and node modeling of the netTerrain catalog, as well as SNMP modeling and more. So, if you are a netTerrain customer, she is your best friend. An experienced tech professional, Marina first gained experience in software maintenance, administration, and support, working as an IT specialist. Marina received her degree in 2012 and shortly after joined the GN team. When she’s not busy crafting realistic device models for netTerrain, Marina enjoys snowboarding and, not surprisingly, pursuing her interest in 3D modeling.
Jan Durnhofer
Jan Dürnhöfer

CEO

Product guy & cheerleader

Maryland, US
About Jan As a founding member of Graphical Networks, Jan’s mission is to make netTerrain the de-facto IT visualization software. After roaming the world a bit with network design, software development, and product management stints in South America, Europe, and the US, Jan decided to call Maryland home. In his free time he enjoys traveling the world, which usually includes a trip to some sunny place with the whole family and a more adventurous one with his wife sans kids (as well as organizing an ever growing collection of 20,000 records).
Mauricio Gil
Mauricio Gil

Software Engineer

Bridge builder

Argentina
About Mauricio 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.
Pablo Gioda
Pablo Gioda

Software Engineer

Cloud magician

Argentina
About Pablo 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.
Brad Irvin
Brad Irvin

Software Engineer

Wealth of knowledge

Maryland, US
About Brad 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.
John Justice Evans
John Justice Evans

Junior Engineer

Security & systems curator

Maryland, US
About Justice 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.
Martin Koen
Martin Koen

Web Developer

Pixel wrangler

Argentina
About Martin 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. A graduate of the Buenos Aires Da Vinci School of Multimedia in 2006, Martin’s amassed almost 20 years of website development experience including work for local powerhouses like Movistar and SanCor. When not fine-tuning pixel perfect portals, Martin plays the guitar, rides his bike around town and, as the proper Argentinian he is, plays soccer (err, we mean “futbol”). You’ll always find Martin sporting the Boca Juniors Jersey (which seems to be the trend at our company).
Fred Koh
Fred Koh

President

Sales & operations honcho

Maryland, US
About Fred 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.
Dmitry Kornilov
Dmitry Kornilov

Principal Engineer

IT visualization geek

California, US
About Dmitry 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.
Adriana Lora
Adriana Lora

Account Manager

Account & client champion

Maryland, US
About Adriana 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. Adri lives in GN’s headquarters city of Gaithersburg, Maryland — when she’s not hard at work at Graphical Networks, she can be found cooking, traveling, and cycling.
Rodrigo Leivas
Rodrigo Leivas

Channel & Product Manager

King of connections

Argentina
About Rodrigo 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).
Hernán López Manilo
Hernán López Manilo

Quality Assurance

QA & UX savant

Spain
About Hernán 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.
Diego Rojas
Diego Rojas

Lab Specialist

Resident lab rat

Maryland, US
About Diego 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.
Nadia
Nadia Sharabarova

Principal Engineer

Wizard, savior, glue

Argentina
About Nadia 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.
Jason Sherman
Jason Sherman

Director of Customer Support

Fan favorite

Maryland, US
About Jason 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 some of his fellow Maryland-based colleagues, he’s staunchly rooting for the Orioles).
Sergey Surkov
Sergey Surkov

CTO

Overall thinker

California, US
About Sergey 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.
Ivan Zholudev
Ivan Zholudev

Senior Software Engineer

API & special projects geek

Armenia
About Ivan 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.