Howdy, I'm Mark Celsor. I've been
building quality websites since 1996
Read My Story

My Story

Scroll for highlights of my career or download my resume.

  • 1994-1996

    First Mac in College

    In college for art history I got my first computer. I started spending my nights playing with Photoshop and building Java applets. I was quickly hooked.

  • 1996-1998

    Designer / Developer for a Local ISP

    Starting in tech support, I moved into their web department designing and developing sites for clients including Cinergy (Duke Energy). These projects and freelance work exposed me to HTML, Perl, and the fundamentals of web design.

  • 1998-2002

    Chief Technologist for Two Small Cincinnati Agencies

    Clients ranged from the National Underground Railroad Freedom Center to the business author Tom Peters. This variety of projects allowed me to learn Java, Visual Basic, Javascript, and Flash.

  • 2002-2005

    Started a Web Team for a Traditional Advertising Agency in San Francisco

    This gave me experience building a team and digital practice inside of a traditional print advertising agency. I standardized us on PHP and we did work for sports clients like Yonex and the Giants.

  • 2005-2008

    Technologist for Cutting-Edge Interactive Agency in Berkeley

    As the agency grew from 12 to 60 employees, we worked for high profile clients like Autodesk, Sun, HP, John Muir Health, and UC Berkeley. I worked for the author of the first book on PHP to develop an early PHP framework and many other technologies.

  • 2008-2013

    Founded Vine Street Interactive

    After my first daughter was born, I decided it was time to move back to Cincinnati to be close to family and to start my own web development business. It started out as part time freelance work from home and grew into an office space in Cincinnati’s historic Over-the-Rhine neighborhood with four full time developers and numerous contractors. Fortunately I was able to maintain many of the connections I had from San Francisco and had opportunities to work on projects for major brands like Adobe, AT&T, Autodesk, Cisco, Clorox, Fleishman-Hillard, Philips, Sandisk, UCSF's Center for AIDS Prevention Studies, and Visa. This role gave me the opportunity to expand well beyond technology to all aspects running an agency. I also had exposure to new technologies going deeper into content management systems and mobile development, including the development of Clorox’s first, award winning, iPhone app called myStain.

  • 2013-2014

    Software Architect with USA / India Based Technology Firm

    I had the opportunity to work with a team of a dozen people in Cincinnati and over 100 in Bangalore India to develop software for mid-sized companies. The role taught me a lot about software development best practices, Agile project management, and working with offshore teams.

  • 2014-2016

    Director of Technology for a National Interactive Agency

    I joined a 280 person agency to start an open source practice but moved on to lead a large technical team of developers, QA, business analysts, and technical project managers. My client portfolio included a diverse set of Fortune 500 companies.

  • 2016-Today

    Software Developer for an International Ecology Program

    After 20 years, I have stepped back from full-time agency work to join the biology department at Miami University and work on software for Project Dragonfly. It is an international ecology research and education program that includes zoo exhibits, publications, PBS shows, master's degree programs, and field studies in places as far flung as Mongolia and Galápagos. This role gives me the opportunity to return to hands-on development for a cause I am passionate about and more flexibility to pursue personal and freelance projects.

  • Freelance


Hire me for freelance projects and consultation.

Front End Development

Responsive HTML and CSS development with a high attention to design. Sophisticated interactivity and animation development with Javascript frameworks like Angular and JQuery. Experience working with web services and deploying hybrid mobile apps.

CMS Development

Template and custom module development for content management systems like Drupal and Wordpress. Experience with systems integration, content editing workflows, web services, and the implementation of headless CMS solutions.

Technical Project Management

Requirements definition, estimation, resource scheduling, onshore/offshore technical team managment, Agile project managment, QA testing, and release planning. Experience with project management tools like Jira and Pivotal Tracker.

Cincinnati, Ohio, USA