Make a significant contribution in the field of user experience design through strategic thinking and skillful execution. Willing to relocate for the right and appropriate position. Professional Summary User Centered Design Specialist and Manager (Technology, People, Operations and Process) with over 11 years experience in User Interface Design and Development using HCI Best Practices and Mobile & Web Development Technologies. Excellent knowledge of User Centric Design and Usability Engineering. Extensive experience in designing and conducting usability evaluations. Profound knowledge in project management methodologies and industry best practices for agile, iterative, waterfall and rapid project cycles. Good understanding of client needs, tasks and goals and expert in translating them into creative concepts. Portfolio: http://www.timprehn.com
Created visual design icon library from scratch for Seven Networks. 2010 Participated in designing the first touch screen mobile 2009 phone UI for a major Japanese manufacturer.
Successfully managed the user experience for major 3G handsets 2004 in Japan and Europe, including the first HSDPA Korean made handset for sale by Vodafone in Japan.
Developed a list of design heuristics specifically for the design 2001 of handheld computers' UI and form factor.
Conducted usability and design of Bluetooth auditory signals 2001 for future handhelds.
Patent applied on wireless application user interface 2000 Training of adults in Windows NT, HTML and Web publishing in 1998 a lab environment.
Consultant In Usability Lab, Indiana University 1998 Editorial Assistant of six published derivative works, Gale Research, 1992 Detroit.
Completion of CIEE Japanese Program, Waseda University, Japan. 1992 Completion of ExplOUration Leadership Camp, Oakland University. 1988.
Usability/UX Specialist July 2013 to CurrentChicago
Led the usability analysis and user experience remotely for a non-profit web site in Los Angeles, CA.
Methodologies employed included: heuristic evaluation, cognitive walk-through, and task analysis.
UI/UX Mobile/Web Designer December 2009 to July 2013closerlook.com － Chicago, IL
Information Architect I.L.R － Chicago, IL
Mobile UI Designer August 2009 to December 2009Seven Networks － Redwood City San Francisco, CA
Contracted for a well-known design agency focusing on state of the art mobile user interfaces and functionality.
Task included mapping the user experience of a standard mobile handset to a new touch screen release, both with white boards and digitally using Excel.
Their client base ranged from medium to global sized enterprises, including Kyocera.
Senior Unified Product Designer February 2008 to May 2009Milpitas, CA
Senior Product designer January 2007 to February 2008Chicago, IL
for a number of applications implemented on web, desktop and mobile software platforms, including: iPhone, Nokia, Windows Mobile, and Palm OS.
The applications and web interfaces are developed for unified communication between various mobile devices, desktop PCs and LAN lines.
Primary work consisted of user experience and improved usability on Motorola devices and mobile phones.
This included leading the redesign of the user experience documentation used by both the consumer design teams and engineering.
Manager March 2004 to June 2006Tokyo
My duties with Vodafone User Experience-Japan in February 2004, I managed the user experience and visual design for successful Sharp and Samsung handsets, in addition the Toshiba "music phone" handset, which was, sold in the Japanese and European markets.
I managed and authored UI flows and specifications for news services and push technology, such as Casting which was piloted in Japan prior to a European launch.
Usability Consultant San Francisco, CA
contractor October 2002 to March 2004Osaka
I conducted quantitative and qualitative usability assessments on PDAs, mobile phones, and web sites.
This also included design and redesign phases of development both in the U.S.
Usability Engineer December 2000 to October 2002Palm, Inc － Santa Clara, CA
As the first usability engineer hired by Palm, Inc., I designed and led usability tests and design on the Palm touch operating system, software, wireless application, new technologies, and the form factor itself.
This included both qualitative and statistical analysis.
I also made recommendations and oversaw the redesign process based on the usability results.
The wireless technologies that I lead usability testing on were: Bluetooth, SMS, IM and wireless web services.
Additionally I conducted form factor reviews while at Palm, Inc, dating back to the Palm VII series.
Lead Usability Engineer September 1999 to December 2000Turbograd, Inc － San Jose, CA
Performed visual design work and usability assessments, for start-up web site in Silicon Valley.
Lead Computer Lab Consultant/LAN Support Staff January 1998 to September 1999IN
Duties included web design, network, hardware and software support of PC and Mac environments, as well as installation of applications and equipment reservations.
Usability Consultant January 1997 to January 1998IN
Duties included network, hardware and software support of PC and Mac environments, as well as installation of applications and equipment reservations.
Education and Training
Master of Information Science : Human-Computer Interaction, 1997Indiana University, School of Library and inform － Bloomington, IN, USA.
Bachelor of Arts : English Literature, 1992CIEE/Waseda University － Tokyo, Japan
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Companies Worked For:
Indiana University, School of Library and inform
Job Titles Held:
UI/UX Mobile/Web Designer
Mobile UI Designer
Senior Unified Product Designer
Senior Product designer
Lead Usability Engineer
Lead Computer Lab Consultant/LAN Support Staff
Master of Information Science : Human-Computer Interaction , 1997 Bachelor of Arts : English Literature , 1992
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