I've worked with 21CT since January 2014, working closely with them through a major company re-brand. During this re-branding initiative, I designed custom marketing collateral of all types and sizes for them...from employee ID cards to full page ads, to custom powerpoint templates, data sheet templates, employee break room and inter-office signage, to their convention booth layout...to name just a few! I also managed and collaborated with another freelance web designer to create their new website and an html email campaign template.
Below is a sampling of these items. (Learn about 21CT at www.21ct.com)
Company "core values" posters in employee break rooms
Invitational postcard (in addition to design, I also dramatically edited the photo to make the tower look like a party is happening instead of it being dark)