Chapters & Committees

THSOA is a 100% volunteer-based society. We rely on our members to help make us successful. In addition to many folks who are behind the scenes, the below list is who you can contact should you have any specific questions. If you are interested in volunteering, please email [email protected] for available opportunities. Every THSOA member is invited to participate in activities from any chapter.


Latin America
Chair                                                          Vice Chair
Alberto Costa Neves                           Bismark Jigena

Mid-Atlantic (Washington, DC, Delaware, Kentucky, Maryland, New Jersey, North Carolina, Pennsylvania, Tennessee, Virginia, and West Virginia)

Chair                                            Vice Chair                              Secretary                                   Treasurer

Daniel Wright                           Deanne Hargrave               Sloan Freeman                        Taylor Krabiel

Midwest (Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin)

Chair                                                          Treasurer                                                Secretary
Washington Bryan                               Denis Buelow                                        Jon Arleth

New England (Maine, Vermont, New Hampshire, Massachusetts, Connecticut, and Rhode Island)

Chair                                                          Treasurer                                                Secretary
Jack Hebert                                            Teri Bridges                                            Tiziana Munene

Southeast (Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, Oklahoma, and South Carolina)

Chair                                                          Secretary
Mike Nitska                                            Rachel Bobich


Chair                                                          Vice Chair                                                Secretary
Mark Borneman                                   Kevin Tomanka                                     Tiziana Munene

West Coast (Alaska, Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah, Washington, and Wyoming)

Chair                                                          Treasurer                                                Secretary
Mike Mutschler                                    Brian Busey                                            Bob Feldpausch


Responsible for the creation and maintenance of the organization's bylaws.

Rafael Ponce

Conference Planning
Develops the program for biannual US Hydro Conference. This includes providing topics, reviewing papers, identifying speakers and alternate choices, planning social activities/meals, and more.

Rafael Ponce

Member Relations
Increase membership benefits with engagement, collaboration, and communication.

Haley Hollis

Professional Development
Coordinates and delivers professional development training and resources for members.

Tom Waddington

Student Outreach & Scholarships
Facilitates THSOA support of students pursuing careers in the Hydrographic industry.

Chris Freeman