EXHIBIT31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TORULE 13a-14(a) OR 15d-14(a), AS ADOPTED PURSUANT TO SECTION302 OF THE SARBANES-OXLEY ACT OF 2002

I, Tobey J.Russ, certify that:

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| 1.  | I have reviewed thisquarterly report on Form 10-Q of Quanta Capital Holdings Ltd.; |

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| 2.  | Based on my knowledge, this report does not containany untrue statement of a material fact or omit to state a materialfact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleadingwith respect to the period covered by this report; |

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| 3.  | Based on my knowledge, the financial statements,and other financial information included in this report, fairly presentin all material respects the financial condition, results of operationsand cash flows of the registrant as of, and for, the periods presentedin this report; |

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| 4.  | The registrant's othercertifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in ExchangeAct Rules 13a-15(e) and 15d-15(e)) for the registrant and have: |

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| a.  | Designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly duringthe period in which this report is being prepared; |

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| b.  | Evaluated the effectiveness of theregistrant's disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation; and |

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| c.  | Disclosed in this report any change in theregistrant's internal control over financial reporting thatoccurred during the registrant's most recent fiscal quarter (theregistrant's fourth fiscal quarter in the case of an annualreport) that has materially affected, or is reasonably likely tomaterially affect, the registrant's internal control overfinancial reporting; and |

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| 5.  | The registrant'sother certifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to theregistrant's auditors and the audit committee ofregistrant's board of directors (or persons performing theequivalent functions): |

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| a.  | All significantdeficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likelyto adversely affect the registrant's ability to record, process,summarize and report financial information; and |

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| b.  | Any fraud, whether or not material, thatinvolves management or other employees who have a significant role inthe registrant's internal control over financial reporting. |

Date: August 8, 2005

/s/ Tobey J.RussTobey J. Russ (Principal ExecutiveOfficer)

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