EXHIBIT 10.b

WORLD
FUEL
SERVICES
CORPORATION

May 13, 1999

Mr. Ralph R. Weiser
700 South Royal Poinciana Boulevard
Suite 800
Miami Springs, Florida 33166

      Re:   Employment  Agreement Between Ralph R. Weiser and World Fuel
            Services  Corporation  (the "Company") dated March 31, 1996,
            as amended

Dear Ralph:

As approved by the Compensation Committee of the Board of Directors, at its
meeting of March 24, 1999, this letter is intended to extend and amend the
above-referenced employment agreement (the "Agreement"). Unless otherwise
defined in this letter, all capitalized terms used herein will have the meanings
assigned to them in the Agreement. According to the terms of the current
Agreement, the Company has now agreed to employ you until March 31, 2002. The
Company has agreed to extend your employment from March 31, 2002 through March
31, 2004 (the "Extension") and in consideration for such extension, you have
agreed to cap the amount of the Bonus payable to you under the Agreement. In
this regard, for good and valuable consideration, we have agreed as follows:

      1.    The Company agrees to extend the term of Executive's employment with
            the Company for two additional years so that it now expires on March
            31, 2004.

      2.    During the Extension, your Base Salary shall be $500,000 per year,
            and your Bonus shall be equal to five percent (5%) of the net
            pre-tax profit of the Company in excess of $7,000,000; provided,
            however, that the Bonus shall not exceed 150% of your Base Salary.
            Prior to the Extension, your Base Salary and Bonus shall remain at
            the rates set forth in the Agreement prior to this Amendment.

      3.    The following paragraph is added as new Section 2.4 of the
            Agreement:



          2.4   STOCK OPTIONS. Executive will be eligible to receive annual
                grants of stock options as determined by the Compensation
                Committee of the Board of Directors of the Company. The grant of
                such stock options shall not exceed the maximum number of shares
                permitted under the applicable stock option plan, and will be
                based on the Executive's performance, the Company's performance
                and the availability of shares. Any options granted to Executive
                hereunder, and any options granted to Executive prior to the
                date hereof, shall upon the occurrence of a Change of Control
                (as defined in the Agreement) immediately vest and become
                exercisable, notwithstanding anything to the contrary contained
                in Exhibit "A" to the Agreement or in the applicable stock
                option agreement or stock option plan.

The terms of this amendment shall supersede any contrary terms set forth in the
Agreement. Except for the modifications of the Agreement set forth above, all of
the terms, provisions and conditions set forth in the Agreement, including
without limitation the Covenant Against Unfair Competition set forth in Section
6 of the Agreement, shall remain in full force and effect. If the foregoing
correctly sets forth our agreement, please sign this letter on the line provided
below whereupon this letter shall constitute a binding agreement between you and
the Company.

Sincerely yours,

/s/ JOHN R. BENBOW
- -----------------------------------
John R. Benbow
Chairman of the Compensation Committee

AGREED AND ACCEPTED:

/s/ RALPH R. WEISER
- -----------------------------------
Ralph R. Weiser