**Exhibit 31.1**

 

**CERTIFICATION**

 

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

 

1.               Ihave reviewed this report on Form 10-K/A of IWT Tesoro Corporation for theyear ended December 31, 2004;

 

2.               Basedon my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statementsmade, in light of the circumstances under which such statements were made, notmisleading with respect to the period covered by this report;

 

3.               Basedon my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

 

4.               Theregistrant’s other certifying officer and I am responsible for establishing andmaintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e) and internal control over financial reporting (as defined inExchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and wehave:

 

a) Designed such disclosurecontrols and procedures, or caused such disclosure controls and procedures tobe designed under our supervision, to ensure that material information relatingto the registrant, including its consolidated subsidiaries, is made known to usby others within those entities, particularly during the period in which thisreport is being prepared;

 

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

 

c) Evaluated theeffectiveness of the registrant’s disclosure controls and procedures presentedin this report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by this reportbased on such evaluation; and

 

d) Disclosed in this reportany change in the registrant’s internal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter that has materiallyaffected, or is reasonably likely to materially affect, the registrant’sinternal control over financial reporting; and

 

5.               Theregistrant’s other certifying officer(s) and I have disclosed, based on ourmost recent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of registrant’s board ofdirectors (or persons performing the equivalent function):

 

a) All significantdeficiencies in the design or operation of internal controls which couldadversely affect the registrant’s ability to record, process, summarize andreport financial data and have identified for the registrant’s auditors anymaterial weaknesses in internal controls; and

 

b) Any fraud, whether or notmaterial, that involves management or other employees who have a significantrole in the registrant’s internal controls over financial reporting.

 

 
| Date: May 6, 2005 | By:                                   | /s/ Henry J. Boucher, Jr. |   |
|------------------------|---------------------------------------|--------------------------------|--------|
|                   | Henry J. Boucher, Jr.,           |
|                   | President and Chief Executive Officer |

 

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