Management Team


Darrell Harrelson

President & Chief Executive Officer

Darrell Harrelson began his working career at the age of fifteen. After applying for jobs all over the City of Ontario, California, he finally got his first real job as a cook, dishwasher, window washer, janitor and everything else that came along with it at the local Dairy Queen. Later at the age of twenty, he was offered by his employer the opportunity to buy into the company where he spent nearly twenty-five years in all.

In 1987, he married his wife Carla, and they moved from Ontario to Hesperia, California. They have three children, Carleen, Sarah, and Mark, and three grandchildren, Matthew, Michael and Shane. In 1988, he and Carla started a non-denominational church in Hesperia, where they are the Senior Pastors and Founders.

Currently Darrell is the President and CEO of three corporations. After being introduced to Dale Wolfenbarger and his product line of ideas, and investing in them, he was later asked to be a partner and the President and Chief Executive Officer of Olive Tree Industries Inc. He also coaches baseball at the local high school as time permits.

Darrell has a great love for people and sees the great need for God’s people to prosper and live a life of victory in these times we’re living in. He believes beyond a shadow of any doubt that it is God’s will for His people to prosper and flourish in every area of life. He also believes that Olive Tree Industries Inc. is a company that has great worldwide potential in the very near future, and where people with “Witty Inventions” can come and get the help they need

I wisdom dwell with prudence, and find out knowledge of witty inventions.” -Proverbs 8:12


Guin “Dale” Wolfenbarger

Vice President—Product Development

Guin D. “Dale” Wolfenbarger and his wife, Rosemary, are residents of Apple Valley, California. They have four children, Jennifer, Lewis, Josephine, and Nicole. Dale and his wife are both Phlebotomists. They participate in their community through various activities.

Throughout his adult life Dale has held several different employment positions ranging from furniture manufacturing, truck driving, and owning and operating his own pet store. He has spent nearly forty years in the medical field and the last twenty two years as a Phlebotomist.

Like most creators of new product ideas or improvements to existing products, Dale conceived the idea that Olive Tree Industries Inc. is currently developing and patenting as a result of personal creativity, professional experience, ingenuity, and a recognized need for such a product.

Dale originally conceived this idea during the month of July in 2005 and first disclosed this information to investors in August 2005. This is his first attempt to produce and patent his invention. He believes this invention will become a reality as it could offer phlebotomists and other medical staff an innovative and effective device that would make the process of drawing blood easier, faster, more hygienic, and safer.

Presently, Dale is also working on many other products that will prove to be a tremendous benefit to people all around the world, as well as a partner and Vice President of Product Development for Olive Tree Industries Inc., the name of which he believes was inspired by the Lord; a company that is helping many different investors and people with their creative ideas and inventions, which has worldwide potential.