**Exhibit 31.1**

 

**CERTIFICATION**

 

I,Henry J. Boucher, Jr., President and Chief Executive Officer of IWT TesoroCorporation, certify that:

 

1.     I have reviewed this report on Form 10-K of IWT Tesoro Corporationfor the year ended December 31, 2005;

 

2.     Based on my knowledge, this report does not contain any untrue statementof a material fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which such statements weremade, not misleading with respect to the period covered by this report;

 

3.     Based on my knowledge, the financial statements, and other financialinformation included in this report, fairly present in all material respectsthe financial condition, results of operations and cash flows of the registrantas of, and for, the periods presented in this report;

 

4.     The registrant’s other certifying officer and I am responsible forestablishing and maintaining disclosure controls and procedures (as defined inExchange Act Rules 13a-15(e) and 15d-15(e) and internal controlover financial reporting (as defined in Exchange ActRules 13a-15(f) and 15d-15(f)) for the registrant and we have:

 

a) Designed such disclosure controls and procedures,or caused such disclosure controls and procedures to be designed under oursupervision, to ensure that material information relating to the registrant,including its consolidated subsidiaries, is made known to us by others withinthose entities, particularly during the period in which this report is beingprepared;

 

b) Paragraph omitted pursuant to SEC Release Nos.33-8238 and 34-47986;

 

c) Evaluated the effectiveness of the registrant’sdisclosure controls and procedures presented in this report our conclusionsabout the effectiveness of the disclosure controls and procedures, as of theend of the period covered by this report based on such evaluation; and

 

d) Disclosed in this report any change in theregistrant’s internal control over financial reporting that occurred during theregistrant’s most recent fiscal quarter that has materially affected, or isreasonably likely to materially affect, the registrant’s internal control overfinancial reporting; and

 

5.     The registrant’s other certifying officer(s) and I have disclosed, basedon our most recent evaluation of internal control over financial reporting, tothe registrant’s auditors and the audit committee of registrant’s board ofdirectors (or persons performing the equivalent function):

 

a) All significant deficiencies in the design oroperation of internal controls which could adversely affect the registrant’sability to record, process, summarize and report financial data and haveidentified for the registrant’s auditors any material weaknesses in internalcontrols; and

 

b) Any fraud, whether or not material, that involvesmanagement or other employees who have a significant role in the registrant’sinternal controls over financial reporting.

 

 
| Date:  May 19, 2006 | By:                                    | /s/ Henry J. Boucher, Jr. |   |
|---------------------|----------------------------------------|--------------------------------|--------|
|                | Henry  J. Boucher, Jr.,           |
|                | President  and Chief Executive Officer |

 

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