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PeerBasis
Compensation Comparability Determination

Aristides De Sousa Mendes Foundation-us

Executive Director / CEO

EIN 273630528
NY · NTEE A80
FY ending 2024-06-30
June 9, 2026

This analysis benchmarks the total compensation of Olivia Mattis Phd, Executive Director / CEO ($51,004) against every comparable organization that fit the selection criteria — 124 in total — drawn systematically from IRS Form 990 filings, not a hand-picked subset.

Compensation sits at approximately the 37th percentile of comparable organizationswithin the typical range

Benchmarked executive: Olivia Mattis Phd — reported title “BOARD PRESIDENT AND CEO”, a direct title match to the Executive Director / CEO role.

How comparable organizations were selected

124 organizations qualified on sector, size, and geography 124 within the band form the benchmarked peer set.

Distribution of comparable compensation

$1,771 total compensation of comparable organizations → $160,021 $51,004
$15,07510th
$36,77225th
$62,790Median
$80,16175th
$94,08590th
$51,004This org · 37th
p10$15,075
p25$36,772
p50$62,790
p75$80,161
p90$94,085
$51,004

Comparable organizations

Each figure is Form 990 Part VII columns D + F (reportable pay plus other compensation and benefits; column F may include amounts from related organizations), normalized to NY cost of living (BEA RPP, 2023) and to its filing year (CPI-U); the reported amount is on each linked 990.

OrganizationStateRevenueMatched titleComp
(reported)
Comp
(adjusted)
FY
Sarpy County Historical Society NE$292,637 Executive Director $57,115 $69,990 2023
The Cambridge Historical Society MA$290,178 Executive Director $116,615 $115,968 2024
Historical Society Of Montgomery County PA$287,660 Executive Director $73,017 $82,961 2023
Camelot Days Inc FL$296,448 Director $10,000 $10,396 2024
North Hawaii Heritage Foundation HI$298,274 Executive Director $47,654 $47,215 2024
Kathmandu Valley Preservation Trust Inc NY$298,584 Executive Director $4,500 $4,500 2024
Friends Of Florida History Inc FL$285,007 Division Dir $21,686 $23,211 2023
Lewis & Clark Trail Heritage Foundation MT$299,037 Ceo $52,423 $62,536 2024
Bardstown Historic Development KY$302,842 Director/curator $47,600 $56,594 2024
Rensselaer County Historical Society NY$303,386 Executive Director $67,385 $69,375 2023
Downtown Carlisle Association PA$304,562 Main Street Manager $74,762 $82,507 2024
Beck Cultural Exchange Center Inc TN$305,869 President $100,865 $117,331 2024
Charleston County Parks Foundation SC$276,622 Executive Di $61,534 $71,041 2024
Doylestown Historical Society Np PA$307,622 Executive Director $36,410 $41,368 2023
The Whitesbog Preservation Trust Inc NJ$276,286 Executive Dir. $58,000 $57,308 2024
High Plains Heritage Society Inc SD$275,804 Executive Director $68,805 $84,034 2024
Musical Arts Society Of New Orleans LA$275,504 Executive Dir. $40,000 $50,182 2023
Main Street Portsmouth OH$275,016 Executive Di $27,605 $33,311 2023
Wegner Arboretum Society SD$309,451 Executive Dir. $60,005 $73,286 2024
Buffalo Heritage Carousel Inc NY$310,356 Executive Director $1,771 $1,771 2024
Greater Ashmont Main Street Inc MA$310,482 Executive Director $58,991 $57,151 2025
Berwick Historical Society PA$273,374 Executive Director $54,530 $60,179 2024
Louisiana Children's LA$272,001 Operations M $30,000 $36,557 2024
Historic Downtown Liberty Inc MO$313,195 Executive Di $75,474 $88,464 2024
Connectcr Inc IA$313,491 Director Of Organizational $9,499 $11,510 2024

Comp (reported) is the figure on each organization's Form 990 (columns D + F); Comp (adjusted) normalizes it to NY cost of living and 2024 dollars. Click any organization to verify the figure on ProPublica.

Methodology

Comparable organizations were drawn from electronically filed IRS Form 990 returns and matched on sector (NTEE code), budget (a size-adaptive revenue band that tightens as the organization grows), and geography (same-state first, broadening only when too few peers qualify); every organization within the band forms the peer set. To compare fairly across regions and years, peer compensation is normalized to NY cost of living (BEA Regional Price Parities, 2023) and to the subject's filing year (CPI-U). The figure benchmarked is Form 990 Part VII, Section A, columns D + F — reportable pay plus other compensation, benefits, and deferred amounts (column F may include amounts from related organizations) — with the chief executive matched by role. Related-organization amounts (column E) and institutional trustees are excluded. Full methodology: peerbasis.org/methodology.

Sample, role match & sensitivity

Sensitivity — the subject's percentile under alternative compensation definitions:

BasisSubject percentile
Total compensation (D + F), cost-of-living + inflation adjusted — the PeerBasis default37th
Total compensation (D + F), as reported (no adjustments)43rd
Reportable pay only (column D), adjusted38th
All sources (D + E + F), adjusted35th

If the percentile moves materially across these definitions, the result is sensitive to methodology choices, and the board should weigh which basis best fits its facts.

Rebuttable presumption of reasonableness · 26 CFR 53.4958-6

Compensation paid by a tax-exempt organization is presumed reasonable — shifting the burden to the IRS — when three requirements are met. This report supplies the comparability data for the second. The board should record the following in its minutes concurrently with its decision:

Draft board minutes — executive compensation

  1. The compensation of the Executive Director / CEO (Olivia Mattis Phd) was approved in advance by [the Board / Compensation Committee], composed of members with no conflict of interest with respect to the arrangement.
  2. Prior to its determination, the authorized body obtained and relied upon appropriate comparability data, namely the PeerBasis Compensation Comparability Determination dated June 9, 2026, comparing compensation against 124 similarly situated organizations (Same NTEE sector (A80), nationwide + budget 0.67–1.5× revenue).
  3. The authorized body determined that total compensation of $51,004 is reasonable (approximately the 37th percentile of comparable organizations) and documented the basis for this determination concurrently, on [date], by a vote of [__ for / __ against].

Sources: IRS Form 990 e-file data (apps.irs.gov); IRS Business Master File (NTEE classification). Every figure traces to an original public filing — click any organization above to verify it on ProPublica. PeerBasis is a service of Prismind Analytics; its methodology is published, was commissioned for independent adversarial review, and discloses its own limitations. This report is comparability data to support a board's good-faith determination under IRC 4958; it is not legal or tax advice. Generated by PeerBasis on June 9, 2026.