Meet our Team - Faculty, Staff, and Coaches
Meet The Vanguard Administration, Faculty, Staff, and Coaches
The Vanguard Faculty, Staff and Coaches are what sets Vanguard apart! They are outstanding!
Executive Committee & Administrative Team
Johnny Graham
Years at Vanguard:
1
Titles:
Head of School
Degree(s):
B.A., – University of North Carolina
M.A., George Washington University
Ed.D., Purdue Global – Est. 2026
M.A., George Washington University
Ed.D., Purdue Global – Est. 2026
Zach Seifert
Years at Vanguard:
18
Titles:
Associate Head of School - Faculty, Technology Dept. Faculty, Administration Team, Executive Committee, Honor Council & Discipline Committee Liaison
Degree(s):
B.A., Austin College
M.S., Baylor University
M.S., Baylor University
Chelsa Ressetar
Class of 1996
Years at Vanguard:
13
Titles:
Associate Head of School - Marketing & Admissions, Technology Dept. Faculty, Administration Team, Executive Committee
Degree(s):
B.B.A., University of Texas
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Felipa Flip Alexander
Years at Vanguard:
26
Titles:
Associate Head of School - Campus Affairs & Student Programs, MS Enrichment Faculty, Administration Team, Executive Committee, Discipline Committee
Degree(s):
B.A.A.S. Tarleton State University
M.Ed., Concordia University
M.Ed., Concordia University
Will Curtis
Years at Vanguard:
22
Titles:
MS PE Facult, MS Athletic Director, Asst. Head of School - External Operations, Discipline Committee, Administration Team
Degree(s):
B.B.A., Baylor University
B.B.A., M.S. Ed., Baylor University
B.B.A., M.S. Ed., Baylor University
Gabrielle DuPree
Class of 2017
Years at Vanguard:
3
Titles:
Director of Student/Faculty Wellness, Counselor, Head MS Volleyball Head Coach, Softball Head Coach, Administration Team, Discipline Committee, Psychology Faculty
Degree(s):
BA, University of Southern California
Shelley Johnson
Years at Vanguard:
17
Titles:
Math Dept.. Faculty, Math Dept. Head, Honor Council Committee, Administration Team
Degree(s):
B.S., Texas A&M University
Greta Knoll
Years at Vanguard:
11
Titles:
Director of Development & Alumni Relations, Administration Team
Degree(s):
B.A., Hamline University
Sarah Lieber
Years at Vanguard:
16
Titles:
English Dept. Faculty, English Dept. Head, Honor Council Committee, Administration Team
Degree(s):
B.A., Wake Forest University
M.A., University of Rochester
M.A., University of Rochester
Brad Schupbach
Years at Vanguard:
2
Titles:
Dean of Students & Campus Safety, HS Football Head Coach, Discipline Committee Lead, Administration Team
Degree(s):
Weatherford College Collin County College
Hannah VanDyke
Years at Vanguard:
9
Titles:
Dir. of College/Career Counselor. & Int. Stu. Programs, Faculty, Administration Team
Degree(s):
B.B.A., Baylor University
Mandy Williams
Years at Vanguard:
5
Titles:
Business Office Coordinator, Administration Team
Degree(s):
A.A.S., McLennan Community College
Jeff Young
Years at Vanguard:
3
Titles:
HS Athletic Director, Head Varsity Girls Basketball, Administration Team, Discipline Committee
Degree(s):
B.S., Univ. of Texas Permian Basin
Faculty, Staff, Coaches (in alphabetical order)
Cambree Aguirre
Years at Vanguard:
1
Titles:
Science Dept. Faculty, Athletic Trainer
Departments:
Science, Athletics
Chris Ajose
Years at Vanguard:
1
Titles:
MS Girls Basketball Head Coach
Departments:
Athletics
Felipa Flip Alexander
Years at Vanguard:
26
Titles:
Associate Head of School - Campus Affairs & Student Programs, MS Enrichment Faculty, Administration Team, Executive Committee, Discipline Committee
Departments:
Enrichment
Wendy Allman
Years at Vanguard:
15
Titles:
English Dept. Faculty, Honor Council Lead
Departments:
English
Matthew Bailey
Class of 2015
Years at Vanguard:
2
Titles:
Science Dept. Faculty, HS Football Asst. Coach, Track & Field Asst. Coach
Departments:
Science, Athletics
Braden Black
Class of 2019
Years at Vanguard:
3
Titles:
Assistant HS Boys Basketball Head Coach
Departments:
Athletics
Melissa Bostwick
Class of 1990
Years at Vanguard:
4
Titles:
Mock Trial Faculty
Departments:
English
Gary Bowdoin
Years at Vanguard:
3
Titles:
Track/CC Head Coach
Departments:
Athletics
Trey Chamness
Years at Vanguard:
2
Titles:
Varsity Golf Head Coach
Departments:
Athletics
Matt Cholopisa
Years at Vanguard:
6
Titles:
Director of Building & Grounds, MS Football Asst. Coach
Departments:
Athletics
Will Curtis
Years at Vanguard:
22
Titles:
MS PE Facult, MS Athletic Director, Asst. Head of School - External Operations, Discipline Committee, Administration Team
Karrie Diffenderfer
Years at Vanguard:
1
Titles:
6th Grade Faculty
Gabrielle DuPree
Class of 2017
Years at Vanguard:
3
Titles:
Director of Student/Faculty Wellness, Counselor, Head MS Volleyball Head Coach, Softball Head Coach, Administration Team, Discipline Committee, Psychology Faculty
Departments:
Athletics
Caleb Durham
Years at Vanguard:
1
Titles:
HS Boys Basketball Asst. Coach
Gretchen Eichenberg
Years at Vanguard:
15
Titles:
Technology Dept. Faculty
Departments:
Enrichment, Technology
Chris Eikenhorst
Years at Vanguard:
1
Titles:
HS Football Asst. Coach, Asst. MS Basketball Asst. Coach, Track Asst. Coach
Departments:
Athletics
Jennifer Ferretter
Years at Vanguard:
18
Titles:
English & Social Science Faculty, Social Science Dept. Head, Administration Team
Departments:
English, Social Science
Joe Flowers
Years at Vanguard:
52
Titles:
Technology Consultant
Departments:
Technology
Patty Flowers
Years at Vanguard:
47
Titles:
Science Dept. Faculty, Science Dept. Head
Departments:
Science
David Foti
Years at Vanguard:
11
Titles:
Social Science Dept. Faculty
Departments:
Social Science
Josh Horton
Years at Vanguard:
3
Titles:
Science Dept. Faculty
Departments:
Science
Kimbrie Horton
Years at Vanguard:
3
Titles:
Sapphire Drill Team - Flag Coach
Departments:
Athletics
Tatum Hosea
Years at Vanguard:
2
Titles:
MS Volleyball Asst. Coach, HS Volleyball Asst. Coach
Departments:
Athletics
Parker Howard
Years at Vanguard:
3
Titles:
Baseball Asst. Coach
Departments:
Athletics
Katie James
Years at Vanguard:
15
Titles:
6th Grade, World Language Dept. Faculty, World Language Dept. Head, Cambridge Institute Contractor
Departments:
6th Grade, World Language
Matthew James
Years at Vanguard:
12
Titles:
English Dept. Faculty
Departments:
English
Shelley Johnson
Years at Vanguard:
17
Titles:
Math Dept.. Faculty, Math Dept. Head, Honor Council Committee, Administration Team
Departments:
Math
Greta Knoll
Years at Vanguard:
11
Titles:
Director of Development & Alumni Relations, Administration Team
Ian Kohler
Class of 2018
Titles:
HS Football Asst. Coach
Departments:
Athletics
Margaret Kurzynski
Years at Vanguard:
7
Titles:
Assistant to the Head of School
Sarah Lieber
Years at Vanguard:
16
Titles:
English Dept. Faculty, English Dept. Head, Honor Council Committee, Administration Team
Departments:
English
Brad Livingstone
Years at Vanguard:
20
Titles:
Social Science Dept. Faculty
Departments:
Social Science
Seir Lopez
Years at Vanguard:
8
Titles:
World Language Dept. Faculty
Departments:
World Language
Amber McKinney
Years at Vanguard:
3
Titles:
World Language Dept. Faculty
Departments:
World Language
Mirko Murillo
Class of 2015
Years at Vanguard:
4
Titles:
Social Science Dept. Faculty, Soccer Asst. Coach
Departments:
Athletics, Social Science
Erika Nielsen
Years at Vanguard:
3
Titles:
Drumline Head Coach
Departments:
Athletics
Regina Nix
Years at Vanguard:
3
Titles:
Social Science Dept. Faculty, Sapphire Drill Team Director/Head Coach
Departments:
Athletics, Social Science
AnnaLauren Packer
Years at Vanguard:
1
Titles:
MS Enrichment Dept. Faculty
Alec Palacios
Years at Vanguard:
2
Titles:
Soccer Head Coach
Departments:
Athletics
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Melissa Price
Years at Vanguard:
9
Titles:
Mathematics Dept. Faculty
Departments:
Math
William Priest
Years at Vanguard:
14
Titles:
World Language Dept. Faculty, Performing Arts Director
Departments:
World Language, Performing Arts
Mike Remus
Years at Vanguard:
2
Titles:
Basketball Head Coach
Departments:
Athletics
Chelsa Ressetar
Class of 1996
Years at Vanguard:
13
Titles:
Associate Head of School - Marketing & Admissions, Technology Dept. Faculty, Administration Team, Executive Committee
Departments:
Enrichment, English
Jeff Rice
Years at Vanguard:
1
Titles:
Orchestra and Choir Coordinator
Departments:
Fine Arts
Brad Schupbach
Years at Vanguard:
2
Titles:
Dean of Students & Campus Safety, HS Football Head Coach, Discipline Committee Lead, Administration Team
Departments:
Athletics
Michelle Schupbach
Years at Vanguard:
2
Titles:
Bostick Cafe’ Manager & Athletic Administrative Assistant, MS and High School Cheerleading Head Coach
Departments:
Athletics
Cathleen Scura
Years at Vanguard:
2
Titles:
Social Science Dept. Faculty
Departments:
Social Science
Zach Seifert
Years at Vanguard:
18
Titles:
Associate Head of School - Faculty, Technology Dept. Faculty, Administration Team, Executive Committee, Honor Council & Discipline Committee Liaison
Departments:
Technology
Adrielle Selke
Years at Vanguard:
4
Titles:
English Dept. Faculty, 6th Grade Director
Departments:
English, 6th Grade
Magen Sepeda
Years at Vanguard:
2
Titles:
Advancement Office Associate
Tonya Shanholtz
Years at Vanguard:
7
Titles:
Art Dept. Faculty, Visual Arts Director
Departments:
Visual Arts
Laurinda Thorp
Titles:
MS Enrichment Dept. Faculty, Substitute Program Lead
Nicanor Torres
Years at Vanguard:
2
Titles:
Baseball Head Coach
Departments:
Athletics
Rylie Underwood
Years at Vanguard:
3
Titles:
HS Volleyball Head Coach
Departments:
Athletics
Kristen VanCleave
Years at Vanguard:
4
Titles:
Administrative Assistant, Office Staff
Hannah VanDyke
Years at Vanguard:
9
Titles:
Dir. of College/Career Counselor. & Int. Stu. Programs, Faculty, Administration Team
Departments:
College Prep
Katherine Weaver
Years at Vanguard:
4
Titles:
Mathematics Dept. Faculty
Departments:
Math
Mandy Williams
Years at Vanguard:
5
Titles:
Business Office Coordinator, Administration Team
Christian Wilson
Years at Vanguard:
1
Titles:
Technology Dept. Faculty
Dianne Young
Years at Vanguard:
2
Titles:
Mathematics Dept. Faculty
Departments:
Math
Jeff Young
Years at Vanguard:
3
Titles:
HS Athletic Director, Head Varsity Girls Basketball, Administration Team, Discipline Committee
Departments:
Athletics