CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-3 of Sigma Labs, Inc. of our report dated April 1, 2019, relating to our audits of the December 31, 2018 and 2017 financial statements, incorporated by reference in the Prospectus, which is part of this Registration Statement.

We also consent to the reference to our firm under the caption “Experts” in such Prospectus.

/s/ Haynie & Company

Haynie & Company

Salt Lake City, Utah

April 26, 2019