About Guy

A quick intro

Hey there, I'm Guy. I'm a versatile digital marketer with over a decade of experience, spanning the scale from early-stage start-ups to the international ad agency world. You're probably here because you want to know more about me. Well, you've come to the right place!

For a look at my professional work check out my LinkedIn profile or keep scrolling down for my resume on this website. To see how I got here you can also read my Master's thesis on authenticity in marketing - still pretty proud of it, I graduated cum laude from the University of Twente.

On the other hand, if you want to get to know me better personally you should definitely visit my blog Style over Substance. If that's too long-form for you, I've got my Twitter account ready with some short-and-sweet thoughts. And if you know me in real life I'm sure I've got you on Facebook already.

So, on the technical side of things you can download all of my original designs from Thingiverse, ready for 3D-printing. More interested in code? My GitHub profile is available to you. The repository that I'm most proud of is HA-meural: a Home Assistant integration for the Meural Canvas digital art frame.

For the more visually inclined you will definitely want to follow my Instagram for the daily stories, Glass for the photo highlights, or alternatively my Flickr account if you just want to see where it all started. My Pinterest boards can also keep you busy for a while.

Want to know more about my taste in music? I've been scrobbling for almost two decades to Last.fm, you can listen to my playlists on Spotify and even find out which concerts I'm going to at Songkick.

And last but not least, you can see what else I'm doing in my spare time by checking out the books I'm reading on Goodreads and the places I visit on Foursquare.


Digital native turned marketing jack-of-all-trades








Social media
(Analog) photography
Disruptive technology
DIY / Making
TV shows
Vintage watches
Craft beer


Where I've Worked...

Curriculum Vitae

Check out my resume


MSc. Communication Studies

University of Twente

Graduated with honors (Cum Laude). Master's thesis available.
Majored in marketing communication and minored in computer science.

Graduated 2011

Mini MBA in Marketing

Marketing Week

Received an A grade on this MBA level, CPD accredited Marketing course taught by marketing professor Mark Ritson.


Mini MBA in Brand Management

Marketing Week

Received a B grade on this MBA level, CPD accredited Brand Management course taught by marketing professor Mark Ritson.



Marketing Manager

Nabu Casa

Nabu Casa is the company building Home Assistant, the open-source home automation platform that puts local control and privacy first.

2023 - Present

Digital Marketing Strategist

Flower Council of Holland

The Flower Council is the marketing foundation tasked with keeping flowers and plants at the top of European consumers' minds.

2018 - 2023

Social Media Strategist


TransIP is the largest domain name registrar and internet hosting provider in the Netherlands and Benelux.


Social Media Specialist


Ultimaker is a global brand of premium desktop 3D printers and creators of the Cura slicer software, the dominant open-source slicer.

2015 - 2017

Community Manager


StructWeb was a start-up building a consumer platform based on an innovative new search technology. It has been rebranded to DOT.world.

2014 - 2015

Social Media Manager

Brooklyn Ventures

Brooklyn Ventures is a Dutch venture capital firm with a primarily online-focused, B2C technology investment portfolio.

2012 - 2014

Social Media Manager


RingCredible was a start-up that used smartphone apps to offer cheap international VOIP calls. It has been rebranded to Talk360.

2012 - 2014

Social Media Manager


SoSocio was a start-up that printed photo albums from your images on social platforms like Facebook and Instagram. It now operates as Printiki.

2012 - 2014

Junior Online Strategist


Etcetera was a full-service ad agency based in Amsterdam and part of the DDB network. The agency has merged into DDB Amsterdam.

2009 - 2010

Intern / Project Manager

Markeys Branding

Markeys Branding was a branding agency specialized in trademarks and company/product naming. It is now known as Markeys.


View on LinkedIn

Get in touch

Guy Sie

LinkedIn: guysie
Email: guy@guysie.nl