Our Company

Whether you’re ready to build your business from scratch, or simply incubate and test something different, Treeline has the experience and flexibility to help you launch your product.

With nearly 15 years of experience in hardware and software, and a full-stack team of developers, designers, engineers, and strategists, Treeline has built everything from mobile apps to wearables, iOT solutions with custom hardware and embedded systems, to complex web applications. Together with your vision and our talented team of experts, we’re here to build your dream into a functional product.

Companies come to Treeline for creative breakthroughs and technical leaps forward. Some of our clients are startups looking to supplement their processes with experienced mentorship and developers on hand. Others are enterprise companies seeking out Treeline’s fresh perspective and ingenuity, hitting the ground running with our agile approach, lightning fast problem solving, and ample resources.

Our unique role allows us to shape shift and take on projects of all sizes and budgets. We have offices both in sunny San Diego and in historical Krakow, Poland, and can adapt to the needs of customers accordingly, abroad and locally. And Treeline’s clients work across a wide market of industries, ranging from action sports to transportation, industrial monitoring to aeronautics, medical equipment to beauty, and so much more. Be sure to check out our case studies for in depth examples!

Treeline’s mission is to profoundly change how people interact with the world around them, while remaining true to our roots of running at startup speed


  • Jake Fields


    Jake Fields is a leader in tech product development and IoT infrastructure. He co-founded his first tech company at the age of 22. His sophomore company was Treeline Interactive, started in the mountains of Lake Tahoe in 2004 with a bare bones team of 12 developers and engineers. Now, nearly 15 years later, Treeline Interactive has successfully grown and spun-off to 3 separate entities that Jake oversees and manages as the CTO: Treeline, and its new sister companies Avimesa, and Platform Science.

    Jake has leveraged his personality, telematics experience, and entrepreneurship to build a distinctive company brand that embraces the Southern California lifestyle of creativity, recreation, and flexibility. His leadership has spawned innovation movements in manufacturing, transportation, aerospace, entertainment and the medical industry; partnering with public and private sector leaders including: ESPN, Viacom, L’Oreal, PWC, Schneider, Lilly, Carlos Slim institute, the FDA and NASA.

    Beyond his professional advancements in the office, Jake had also lectured on the topic of digital innovation while providing advanced career mentorship for university students at various colleges, including San Diego State and University of California San Diego. Jake is also an avid adventurer and athlete, enjoying snowboarding, hiking, big wave surfing, and other action sports.

  • Mark Modzelewski

    General Manager

    Mark is a seasoned startup executive, having founded numerous successful companies and served as a senior executive at others in the sectors of iOT, nanotech, beacon and sensor networks, and more. Mark has had an eclectic and distinguished career at the junction of technology, policy, and entrepreneurship, focused on taking companies and products from concept to launch to exponential growth. Startup incubation isn’t just his speciality, it’s his passion project. In addition to launching some of the most iconic products on the market, Mark has helped grow companies from a pitch deck to seed funding to Series A funding.

    After years of founding, funding, and advising leading startups across the US and Europe, Mark and his dog Sunny have landed in California to help head operations at Treeline. When he's not at the office, Mark is an activist, strongman athlete, and conceptual artist whose work has appeared in numerous galleries and museums. His experience in art and design lends an extra hand at work, where his creative problem solving and design-based thinking stand out… not to mention his unique connections.

  • Carter Casner

    VP of Operations

    Carter Casner has worked in many different roles across the production team at Treeline since joining in 2012. His experience in project and product management brings immense value to the discipline and structure of how Treeline approaches projects of varying size and scope. The team’s agile approach and dedication can be attributed to Carter’s day to day leadership.

    Prior to Treeline, Carter worked for venture-backed San Diego startup Mogl (now Empyr), a mobile transaction-based consumer loyalty and rewards business. He also worked for MojoPages, where he was responsible for product marketing and implementing game mechanics to drive user engagement. Carter’s diverse background in marketing and product development brings a unique perspective to his management style, demanding measurable benchmarks from his team and ensuring the highest quality communication with Treeline’s clients.

    In his spare time Carter loves skiing, surfing, spear fishing, and spending time trying to get his daughter and wife to love those things as well.

Treeline Family

Our Roots

Founded in the mountains of Lake Tahoe in 2004, we’ve since moved to the shores of San Diego. Now we find ourselves expanding, with an office in Krakow, Poland, and numerous Treeline consultants stationed across the US in Los Angeles, Austin, and more. For 15 years we’ve helped companies ranging from medical device innovators, to transportation fleets, to large scale sporting events modernize their business and bring new products to market.

Industry Awards

While the true measure of success is seeing Treeline projects launched and thriving, we have humbly accepted several awards and recognition for our products over the years. Here are a few of them!