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Counseling Department

The mission of the American Canyon High School Counseling Department is to guide and prepare all students to be 21st century leaders by instilling our core values of relationships, relevance, and achievement. Our goal is to provide a comprehensive school counseling program by assisting students to develop and enhance their academic, personal/social, and career strengths to become lifelong learners, productive workers, and responsible citizens in the school and community.


9th Grade 2021

Vanna Som, Department Chair

Quick Bio

  • Born in Malaysia during the Cambodian Genocide

  • Married for 15 years, and I have 3 children

  • 1st generation college graduate

  • Earned my Bachelors in Social Science, and Master of Arts in Counseling/Pupil Personnel Services (PPS) from Sonoma State University

  • 15 years of counseling experience, 7 with NVUSD

  • Love to watch baseball (SF Giants), football (Philadelphia Eagles, and basketball (Golden State Warriors)

  • Hobbies include: hiking, playing fantasy football, and spending time with the family



Welcome to the world of high school! I genuinely look forward to meeting all of you once we can move forward from the impact of the COVID-19 pandemic. I acknowledge that not being physically present with your new teachers and friends can be a discouraging feeling to connect to school. As your counselor, I strongly believe that you can take on the challenges of distance learning, and rise above the circumstances. Challenges in school or in life general cannot be conquered alone. It is my goal to support you in this transition and throughout your four years of high school. I also want to encourage you to think of high school as an opportunity to learn more about yourself. You have teachers and other support staff that can guide your through your journey. Please reach out to us if you need help.

Mark DeMesa

Quick Bio

  • Born and raised in Vallejo, California

  • Married for five years & father of four year old boy

  • 17th year as a school counselor

  • 10th year at American Canyon High School

  • Earned my Bachelor of Science in Social Science and Master of Science of School Counseling at CSU, Sacramento

  • Second job as a job coach/job developer for adults with developmental disabilities for the past 19 years

  • I enjoy traveling, laying out on the beach, spending time with family, and reading

9th grade



Hello Juniors! Although this school year looks very different, one thing remains the same, your resiliency and my dedication to providing you support in your academic, social, and personal lives.

This will be my 17th year as a school counselor and my 7th year at American Canyon High School. The Class of 2023 is my third graduating class. I am honored to work on the AVID Site Team as the Site Coordinator at ACHS and every summer I work with the incoming 9th graders and with the Summer College Readiness Academy team as the Academy Director.

Tricia Hernandez

My Google Classroom

My Virtual Office

  • School Counselor

  • AVID Site Coordinator

  • Summer College Readiness Academy Director

Quick Bio

I was born and raised in the Bay Area and attended San Francisco State University for both my Bachelors Degree in Psychology and my Masters Degree in Counseling. I am a San Francisco Giants and 49'er fan, love interior design, and am proud to be of Filipino decent.

I am a mother to three children, age 9, 6, and 4. They keep me motivated, determined, and humble. My family loves going to the beach and visiting Disneyland.

Junior Parent Night





Greetings Students and Families! I am so excited to serve you and your students, and since I have the amazing opportunity to get to know them so well, I thought I'd tell you a little bit about myself too. 


Link to 12th Grade Parent Night Google Slide Deck

parent night


Lilliana Zmed

Quick Bio

I’ve been lucky to work for NVUSD as a School Counselor for fourteen years, but have worked in education for 17!

I lived in 6 different states by the time I was 22, but I consider Amherst, Massachusetts “home”.

I earned my Bachelor's Degree (Sociology) from the University of North Carolina-Chapel Hill (Go Heels!), and my Master's Degree (Education) from the University of Massachusetts-Boston.

I have a passion for travel and listen to human interest podcasts on my time off. I am also very proud of my Romanian heritage-- my dad was born in Romania and the Zmed’s sacrificed a lot to come to the US in 1955 through Ellis Island for a better life (you can even find Zmed on the Ellis Island name wall!). My sister Julia is also a teacher at NVUSD and is my best friend. My other best friends are my dog Sullivan and my 3-legged cat named Squeaks.


Troy LenningTroy Lenning

Quick Bio

Warm greetings ACHS! It's a great honor to be a part of such an amazing school community. I look forward to learning and supporting our students and their families as they return to in-person learning this school year. 

  • Born and raised in Napa, CA

  • 7th year as a professional counselor, and third year working for NVUSD (first as a certified school counselor!)

  • I earned my Bachelor's Degree in Psychology and Master's Degree in Counseling from Sonoma State University

  • Avid San Francisco Giants and 49ers fan

  • Have an unhealthy obsession with Marvel Superheroes and Lord of the Rings films (they’re so good!!!)

  • Passionate about billiards, pizza-making, and spending time with my wife




Reasons to see your counselor:
  • Academic Planning or Concerns
  • College & Career Planning
  • Credit Recovery & Alternative Education Referrals
  • Social & Emotional Support
  • Conflict Resolution & Mediation