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James W. Sewall


Sewall forester Tim Mack achieves real estate appraisal licensure in Minnesota. Senior Consultant and Biometrician Timothy Mack, ACF, recently earned his license as a Certified General Real Estate Appraiser (CGA)

Sewall is pleased to announce that Senior Consultant and Biometrician Timothy Mack, ACF, recently earned his license as a Certified General Real Estate Appraiser (CGA) in the State of Minnesota. His newest certification supports Sewall’s forest and natural resource valuation and due diligence efforts.

As a Senior Consultant in Forestry & Natural Resources, Mr. Mack performs forest modeling, inventory, due diligence, and appraisal work throughout the world, from native tropical forests to pine and eucalyptus plantations in Australasia. He is widely regarded as a specialist in teak, having cruised, modeled, and appraised plantations throughout Central and South America. During his career, he has designed and built forest-level harvest schedule models and implemented their results on the ground.
Bret Vicary, Vice President of Forestry & Natural Resource Consulting, said of Mr. Mack’s role at Sewall, “Tim came to Sewall in 2004 with deep industry experience in forest modeling and inventory, became involved in forest valuation, and has become one of the most capable natural resource appraisers in the world. He combines high-level analytical skills with the kind of practical intuition that few consultants have. Our clients place tremendous trust in Tim, and they solicit his help with due diligence and appraisal across five continents. In addition, Tim is a delight to work with, undaunted by challenge, and cheerful under most any circumstance. He is a highly valued complement to Sewall’s team, and becoming fully licensed as a Certified General Appraiser adds an important notch to his already impressive resume. As a member of the Association of Consulting Foresters, Tim typifies the high level of integrity and professionalism that ACF represents.”

Mr. Mack works out of Sewall’s International Falls, Minnesota, office, and can be reached at (218) 331-2568 |

About Sewall: Founded in 1880, Sewall is an international professional consulting organization specializing in natural resources, energy, and infrastructure. The company’s diverse portfolio is based on 135 years' experience in forestry and natural resource consulting, surveying, and civil engineering; 65 years' in remote sensing; and 30 years' in GIS and application development. For information, please visit or contact Bret Vicary at (207) 817-5447 |



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