Inc. magazine has published their 2013 500|5000 List of the Fastest Growing Companies in America and has ranked Waltham, Mass.-based company, Pro Teck Valuation Services, on its list of fastest growing privately held companies for the sixth year in a row. Pro Teck provides residential real estate valuations and customized risk management for funding, investing, servicing and secondary market requirements. Pro Teck also is listed 83rd of the top 100 real estate companies nationally this year and has doubled its workforce over the last three years. The Inc. 500|5000 list was first published in 1982 and recognizes the fastest growing privately held companies in the United States. For the past thirty-one years, Inc. Magazine has been reviewing and honoring private companies that are on track for fast growth. "Pro Teck Valuation Services is honored to be part of the Inc. 500|5000 List for the sixth year in a row," said Tom O'Grady, CEO of Pro Teck Valuation Services. "This year's ranking highlights the sustained growth that our company has delivered. We also appreciate the hard work of our employees who have helped to consistently grow our business over the past six years."