<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0201</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001335293</cik>
        <entityName>Vector Intersect Security Acquisition Corp.</entityName>
        <issuerAddress>
            <street1>65 Challenger Road</street1>
            <street2></street2>
            <city>Ridgefield Park</city>
            <stateOrCountry>NJ</stateOrCountry>
            <zipCode>07660</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>201-708-9801</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>DE</jurisdictionOfInc>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2005</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Yaron</firstName>
                <middleName></middleName>
                <lastName>Eitan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Marc</firstName>
                <middleName>L.</middleName>
                <lastName>Abramowitz</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Joseph</firstName>
                <middleName>T.</middleName>
                <lastName>Gorman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <middleName>G.</middleName>
                <lastName>Rebar</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Winston</firstName>
                <middleName>J.</middleName>
                <lastName>Churchill, Jr.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Chakkenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Isaac</firstName>
                <middleName></middleName>
                <lastName>Applebaum</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Doron</firstName>
                <middleName></middleName>
                <lastName>Cohen</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Archie</firstName>
                <middleName>Ray</middleName>
                <lastName>Clemins</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>65 Challenger Road</street1>
                <street2></street2>
                <city>Ridgefield Park</city>
                <stateOrCountry>NJ</stateOrCountry>
                <zipCode>07660</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>$1 - $1,000,000</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2008-12-19</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>true</isBusinessCombinationTransaction>
            <clarificationOfResponse>The Issuer, a blank check company, acquired an operating business in the security industry via a business combination.</clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>51300000</totalOfferingAmount>
            <totalAmountSold>51300000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>true</hasNonAccreditedInvestors>
            <numberNonAccreditedInvestors>1</numberNonAccreditedInvestors>
            <totalNumberAlreadyInvested>19</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>true</authorizedRepresentative>
            <signature>
                <issuerName>Vector Intersect Security Acquisition Corp.</issuerName>
                <signatureName>Yaron Eitan</signatureName>
                <nameOfSigner>Yaron Eitan</nameOfSigner>
                <signatureTitle>President and Chief Executive Officer</signatureTitle>
                <signatureDate>2008-12-19</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
