Your Trusted Appraisers

Brian J. Gatzke

Email: Brian J. Gatzke

Office: 605-692-9445

Mobile: 605-691-2119


Brian J. Gatzke

Owner / Certified General Appraiser (ARA, MBA) (SD, IA, MN)

Adjunct for South Dakota State University Ness School. Chair of ASFMRA Education committee. Instructor appraiser and education developer for appraisal and valuation topics for American Society of Farm Managers and Rural Appraisers 2017 to present, The Land Trust Alliance at Rally speaker 2016, SD Ag Bankers in 2014-16, 19 and SD Bar in 2014. Active board member of the South Dakota Chapter of ASFMRA 2015-present. 2013-2015 Board member of the North Star Chapter of the Appraisal Institute and successfully completed AI-LDAC 3-year training program. Past Committee Chair (2008-2009) of the Brookings Area Chamber of Commerce Agricultural Relations Committee, past president of Rotary International Club of Brookings, SD, and currently active with the SD Historical Society Foundation board member and Treasurer 2015-16.

My wife and I own agricultural, residential, and commercial properties in eastern South Dakota. I was raised on a family farming/livestock operation and involved in agriculture for more than forty years. These interests maintain my foundation in the agriculture and commercial sectors. From 1982-2003, (20 years) I was employed by Daktronics, Inc. as traded on the NASDAQ @ DAKT.

Member of ASFMRA, AI, IRWA, LTA, PAASD, SDARL, Rotary International, MLS Realtor

Email: Anna Boomsma

Office: 605-692-9445

Mobile: 605-940-7217

Anna Boomsma

Registered Trainee Appraiser (SD)

Ms Boomsma graduated from South Dakota State University in Brookings, SD in 2021 with an economics degree and land valuation minor.  She interned at Northern Plains Appraisal office.  Anna became an official South Dakota state registered trainee appraiser in 2024.

Anna’s focus is on agriculture and farm sites & operations. She currently resides in Watertown, SD.







Email: Carter Canham

Office: 605-893-2003

Mobile: 605-204-0759

Carter Canham

Registered Trainee Appraiser (SD)

Mr. Canham is a South Dakota native who grew up on a ranch outside of Miller, South Dakota. Throughout the years, he has worked extensively with his family’s ranching, vegetation and pest management ventures across South Dakota.

Carter graduated from South Dakota State University with a degree in Agricultural Business and a minor in Marketing. Soon after graduation, he joined American Land Agency, LLC as a Land Broker Associate and Land Manager. Working on the brokerage side, he has been able to gain hands-on experience working with buyers and sellers in the market. He decided to dive deeper into the market analysis and appraisal field by working cooperatively with Northern Plains Appraisal.

This joint opportunity has allowed him to further develop his understanding of agricultural land markets across South Dakota. Carter enjoys using the knowledge he has gained in the appraisal and brokerage fields to best serve his clients.

Member of: ASFMRA, PAASD

Email: John Green

Office: 605-692-9445

Mobile: 541-306-7582

John Green

Registered Trainee Appraiser (SD)

Mr. Green started with Northern Plains Appraisal in May of 2022 and is currently working towards his Certified General appraisal license and eventual ARA and MAI designations.  He has appraisal experience in various types of agricultural property, commercial/industrial properties, and special use assignments, such as condemnation and eminent domain work.

Prior to his time at Northern Plain Appraisal, he worked for five years as a land use planner, first for the City of Rapid City (2018 to 2020) and then for El Paso County, Colorado (2020 to 2022).  As a land use planner, Mr. Green worked extensively in development project review for subdivisions, complex land use permits, and zoning administration.  In 2015, he received a B.S. degree in Geography and B.S. degree in Geographic Information Sciences (G.I.S.) from South Dakota State University.  In 2018, he completed his M.S. degree in Geography, also from South Dakota State University.

Mr. Green originally grew up in Sisters, Oregon.  In his spare time, he enjoys spending time with family, attending SDSU sporting events, and being outdoors hunting, fishing, and training his bird dog.

Memberships:  Appraisal Institute, American Society of Farm managers and Rural Appraiser

Email: Mandy Trudeau

Office: 701-680-9351

Mobile: 701-680-9351

Mandy Trudeau

Certified General Appraiser (SD, IA, NE, MN)

Ms Trudeau grew up on a row crop and livestock farm in southeastern North Dakota. She graduated from South Dakota State University in 2016 with a bachelor’s degree in animal science business and production and minors in ag business and agronomy.

Mandy began her appraisal career in 2014 while finishing her bachelor’s degree and became fully certified in 2020. Mandy is currently licensed in South Dakota, Iowa, Nebraska and Minnesota.