Our Team


We are a tight-knit team of design, technology and ui/ux professionals passionate about creating accessible website development for everyone.


Dave Kosmayer

Founder and CEO

David created his first company at 22 just coming out of college. Marketing Extensions Inc. an online affiliate and marketing agency was born from the basement of his parent’s home. This company grew under his leadership into a 55-person team, topping $60M in revenue in less than a decade. David is highly focused, dedicated and passionate about building successful companies. In Dave’s spare time he enjoys cooking, hiking long distances and gaming.


Atanas Krangov

Chief Technology Officer

Atanas is responsible for managing Bookmark’s development team. He’s a full stack developer with many contributions to Bookmark too many to count. Prior to Bookmark Atanas lead the team at MD.com - Largest website database for finding a doctor in the United States. Atanas has a master’s degree in Software Engineering from the Faculty of Computer Science and Engineering in Skopje. When he’s not working Atanas loves to jump on his motorcycle and cruise.


Petar Shokarovski

VP Engineer

Petar is lead engineer and brainchild behind the architecture of Bookmark’s website development software. Prior to Bookmark Petar lead the team creating Tag N Go software, he was system architect and front end developer. Petar loves solving complex problems, he’s passionate about mobile tech, web crawling and self learning categorization algorithms. Also for enjoyment Petar does puzzles, mazes and most of all is exceptional in the kitchen where he loves to cook and has his own cooking blog.


Nicole Kosmayer

CMO, Head of Brand

Nicole leads the marketing side of Bookmark. She is a hustler & thought-leader with experience in Brand, Marketing, Management, and Sales. Prior to Bookmark, Nicole gained experience in launching and building big brands across Canada. In her spare time, she enjoys yoga, catching up with family and friends, and walking through Toronto with her husband and son to discover new playgrounds.


Cam Gray

Head of Customer Success

Cam is responsible for the customer journey at Bookmark - if something is great, he would love to hear about it and the same if something is troubling you. From working with elite Freestyle Skiers, to assisting many start-ups create an active management style of Customer Success, Cam has done it all. In his spare time he likes to paint, study Astrophysics and build Lego with his daughter.


Dimitar Georgievski

Head of Design

Dimi is responsible for all design, UI / UX throughout Bookmark. Dimi loves what he’s doing, he’s passionate about graphic design. Quality, simplicity and beauty is his style. Prior to Bookmark Dimi worked on T -Mobile touch screen applications. In his spare time he enjoys photography and being a Dad.


Manny Mangat

Growth Marketer

Manny is apart of the marketing team at Bookmark. He brings skills in marketing communication, project management, and social strategy. In his spare time, Manny enjoys DJing and performing improv regularly around the city.


Denton Cockburn, PHD

AI Advisor / BBM

At BBM Denton Leads a team of Data Analysts, Data Engineers and Data Scientists in a cloud architecture that works with petabytes of data using cutting edge technologies including Airflow, Apache Spark, BigQuery, Tableau on the Google Cloud Platform.


Kat Grzeegorska


Kat manages all the financial statements, payroll, accounts payable, accounts receivable, tax compliance, and various other duties. Kat's an avid animal lover, has a family of 4 and loves to go shopping on her spare time.


Marko Andrevski

Web Developer

Marko is responsible for designing, coding and modifying websites, from layout to function and according to a client's specifications. Strive to create visually appealing sites that feature user-friendly design and clear navigation. In his spare time he likes to mix spirits and create great cocktails."Don't drink and drive".


Irena Spasovska

Web Developer

Irena recently joined Bookmark. She is a part of our development team. Irena is a full stack developer currently focused on back-end development of Bookmark's newly features. In her spare time she likes to go to concerts and practice yoga.