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April Colitoy-Gaerlan

Assistant Science Communicator

location Office Location: Dean Circle House #4
Mailing Address: UOG Station, Mangilao, Guam 96923
David Combosch, Ph.D.

Associate Professor of Population Genetics | Graduate Biology Program Chair

location Office Location: ML 109
Mailing Address: UOG Station, Mangilao, Guam 96923
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My research addresses fundamental questions about the evolution of marine invertebrates. I combine field observations, field collections, museum specimens and experimental manipulations to address original questions in population genetics, phylogenetics, phylogeography, molecular ecology and genomics. My scientific approach is to focus primarily on fundamentals and foundational concepts. Consequently, I started working on corals, the ecosystem engineers of coral reefs, and studied their most fundamental characteristics: species identity, reproduction, and population genetics. Meanwhile, I expanded to other organisms, new questions, and more interdisciplinary approaches. Evolutionary Genomics, Population Genetics, Phylogenetics, Molecular Ecology, Conservation Genetics; invertebrates, especially corals.




  • B.S., Ecology, University-GH Essen (Germany)
  • M.S., Environmental Sciences, University of Duisburg-Essen (Germany)
  • Ph.D., Ecology, Northeastern University (Mass.)
  • CV
Teddy Lee Concepcion

Extension Assistant II

location Office Location: ELI Building, Room 203
Mailing Address: UOG Station, Mangilao, Guam 96923
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Teddy supports activities and research through UOG Sea Grant's Guam Restoration of Watersheds Initiative. He works closely with the Guam Department of Agriculture to maintain a plant nursery that will produce tree saplings to be planted along watershed to prevent soil runoff.

Christine Concepcion

Inventory Associate

location Office Location: Student Services Building
Mailing Address: UOG Station, Mangilao, Guam 96923
Abby Crain

G3 Circular Economy Education Coordinator

location Office Location: Guam Green Growth Circular Economy Makerspace and Innovation Hub, CHamoru Village
Mailing Address: UOG Station, Mangilao, Guam 96923
Carmen Diane Crisostomo

Library Technician II

location Office Location: RFK Library, GovDocs
Mailing Address: UOG Station, Mangilao, Guam 96923
David Chrisostomo

Aquaculture Specialist (Extension Associate II)

location Office Location: ELI Building, 2nd Floor above Science Learning Center
Mailing Address: UOG Station, Mangilao, Guam 96923
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  • Master of Agriculture with specialization in Fisheries Science from Texas A&M University
  • Bachelor of Science in Fisheries Science from the University of Washington.

Specialized experience

  • 28 years as an Extension Agent for Aquaculture at UOG Cooperative Extension Service
Doreen T. Crisostomo-Muña

Professor of Accounting

location Office Location: SBPA 230
Mailing Address: UOG Station, Mangilao, Guam 96923
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Dr. Doreen T. Crisostomo-Muña is a Professor of Accounting in the School of Business and Public Administration at the University of Guam. She teaches courses in the Accounting and Public Administration programs. Currently, she is the Accountability Director for the AGA-Guam Chapter, and reviewer to the Popular Annual Financial Reporting Award Program of the Government Finance Officers Association.

She has published articles on topics of government accounting, public policy, accounting systems, and pedagogy. In recognition of her work, she has received several awards from AGA National, including the 2022 Educator Award, Chapter Accountability and Transparency awards, the Platinum Level Chapter Recognition Award, and the Platinum Regional Vice President Award. She has also been awarded the NASBA Center for the Public Trust Campus Being a Difference Award for ethical leadership, UOG Community Awareness Award for research, and was a nominee for the American Institute of Certified Public Accountants George Krull/Grant Thornton Teaching Innovation Award.


  • BBA, Accounting, University of Guam
  • MBA, Accounting, University of Phoenix
  • Ph.D., Organization and Management, Capella University (Minn.)
  • Certified Government Financial Manager
  • Certified Fraud Examiner
  • Certified Internal Controls Auditor

Associate Dean and Registrar

location Office Location: Office of Admissions & Records, Calvo Field House
Mailing Address: UOG Station, Mangilao, Guam 96923
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  • B.S., Public Administration, University of Guam
  • MPA, University of Guam
Mariel Cruz

Laboratory Manager

location Office Location: WERI Annex 123
Mailing Address: UOG Station, Mangilao, Guam 96923
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