I have contributed to chef and authored DevOps tools, Vagrant Plugin. My team includes experienced sysadmins & developers who manage Cloud infrastructure(on AWS, Google Cloud, Rackspace) for various clients across globe for last 9 years. Other programming skills like ROR, Python, AngularJS, PHP. etc and automation tools used like Jenkins, chef etc. and Databases handled like Mysql, Postgresql, mongodb etc. I have managed over 2000 nodes in chef.
Could you share more details about how long you are looking for the support? and what will be exact requirement?
Feel free to contact me for further discussion.