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Organizations Science & Technology Research TMT International Observatory LLC

TMT International Observatory LLC

Fiscal year ending 2018. Filed on November 8, 2019.

100 W Walnut Street Suite 300
Bachman Hall 105
Pasadena, California 91124

TMT International Observatory LLC (EIN: 30-0833462) has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2018 IRS Form 990 filing, TMT International Observatory LLC, a 501(c)(3) charitable organization, reported compensation for 8 out of 52 total employees. Among the employees shown here, the average compensation is $314,424. The highest compensated employee at TMT International Observatory LLC is Benjamin Gallagher with fiscal year 2018 compensation of $378,059.

Revenue, expenses, and employee compensation

Revenue

$59,389,392

Expenses

$16,134,505

Employee compensation

$2,917,839
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

Benjamin Gallagher
M1 System Lead Engineer
$378,059
$329,352 No related comp$48,707
Gary Sanders
Project Manager
$360,283
$314,951 No related comp$45,332
Christophe Dumas
Observatory Scientist
$313,043
$259,546 No related comp$53,497
Fengchuan Liu
Deputy Project Manager
$306,663
$250,347 No related comp$56,316
Ravinder Bhatia
Associate Project Manager
$305,811
$244,814 No related comp$60,997
Mark Sirota
Telescope Ctrls Group Leader
$293,996
$229,602 No related comp$64,394
Sandra Dawson
MGR Hawai'I Community Affairs
$284,337
$235,677 No related comp$48,660
Edward Stone
Executive Director
$273,201
$243,759 No related comp$29,442

Benchmark Employee Compensation

Non-Employee Board Members

An Ramaparkash
Governor
B Thomas Soifer
Governor
Diana Jergovic
Secretary/Governor
Donald Brooks
Governor
Doug Welch
Governor - End Date 7/16/18
Eswar Reddy
Governor
Fiona Harrison
Governor - End Date 10/31/18
Gang Zhao
Governor
Gregory Fahlman
Governor
Henry Yang
Chair
Jonas Zmuidzinas
Governor - Start Date 10/31/18
Kim Venn
Governor - Start Date 7/16/18

Contractors

California Institute of Technology
Scientific
$5,535,354
Bcf Solutions
Professional
$2,194,455
Regents of the University of CA Dba
Scientific
$1,784,322
Hogan Lovells US LLP
Professional
$1,180,800
Arizona Optical Systems LLC
Engineering
$1,114,771

Mission Statement

SEE SCHEDULE O

Revisions to this organization profile

November 17, 2025:
2024 TMT International Observatory LLC 990 filed
November 13, 2024:
2023 TMT International Observatory LLC 990 filed
November 10, 2023:
2022 TMT International Observatory LLC 990 filed

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