**EXHIBIT 31.2**

**CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTEDPURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002**

I, Duane D. Deaner, certify that:

|   | 1.     | I have reviewed this quarterly    report on Form 10-Q of Environmental Tectonics Corporation;                                                                                                                                                                                                                                              |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   | 2.     | Based on my knowledge, this        report does not contain any untrue statement of a material fact or omit        to state a material fact necessary to make the statements made, in light        of the circumstances under which such statements were made, not misleading    with respect to the period covered by this report;         |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   | 3.     | Based on my knowledge, the financial        statements, and other financial information included in this report,        fairly present in all material respects the financial condition, results        of operations and cash flows of the registrant as of, and for, the periods    presented in this report;                            |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   | 4.     | The registrant’s other        certifying officers and I are responsible for establishing and maintaining        disclosure controls and procedures (as defined in Exchange Act Rules    13a-15(e) and 15d-15(e)) for the registrant and have:                                                                                        |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   |   | a)                                                                                                                                                                                                                                                                                                                                         |   | Designed        such disclosure controls and procedures, or caused such disclosure controls        and procedures to be designed under our supervision, to ensure that material        information relating to the registrant, including its consolidated subsidiaries,        is made known to us by others within those entities, particularly during    the period in which this report is being prepared; |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   |   | b)                                                                                                                                                                                                                                                                                                                                         |   | Evaluated the effectiveness        of the registrant’s disclosure controls and procedures and presented        in this report our conclusions about the effectiveness of the disclosure        controls and procedures, as of the end of the period covered by this    report based on such evaluation; and |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   |   | c)                                                                                                                                                                                                                                                                                                                                         |   | Disclosed in this report any        change in the registrant’s internal control over financial reporting        that occurred during the registrant’s most recent fiscal quarter        that has materially affected, or is reasonably likely to materially affect,    the registrant’s internal control over financial reporting; and |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   | 5.     | The registrant’s other        certifying officers and I have disclosed, based on our most recent evaluation        of internal control over financial reporting, to the registrant’s        auditors and the audit committee of the registrant’s board of directors    (or persons performing the equivalent functions): |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   |   | a)                                                                                                                                                                                                                                                                                                                                         |   | All significant deficiencies        and material weaknesses in the design or operation of internal control        over financial reporting which are reasonably likely to adversely affect        the registrant’s ability to record, process, summarize and report    financial information; and |
|   |   |                                                                                                                                                                                                                                                                                                                                       |   |   |
|   |   | b)                                                                                                                                                                                                                                                                                                                                         |   | Any fraud, whether or not material,        that involves management or other employees who have a significant role    in the registrant’s internal control over financial reporting. |

Date:  January 9, 2006

|   |   |   |   |   |   | By:/s/ Duane D. Deaner |
|--------|--------|--------|--------|--------|--------|------------------------|

|   |   |   |   |   |   |   | Duane D. Deaner |
|--------|--------|--------|--------|--------|--------|--------|-----------------|

|   |   |   |   |   |   |   | Chief Financial Officer |
|--------|--------|--------|--------|--------|--------|--------|-------------------------|

 

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