Since its founding in 1976, Oakcrest School has benefited from strong, stable leadership. There have been six heads of school in Oakcrest history, and each of these visionary women has been faithful to the Oakcrest mission. The Board of Directors serve as the governing body of the school. The Head of School is a voting member of the Board of Directors. The Board of Trustees, part of the school’s governance structure, approves nominations to that board. Its members include many of the school’s most ardent and loyal supporters and ambassadors.
    • Mary T. Ortiz, Ph.D., Head of School

As the sixth head of Oakcrest School, Dr. Ortiz continues the legacy of visionary women entrusted with the Oakcrest mission of educating young women of intellect, faith, and character.  

List of 3 items.

  • Her Education

    Dr. Ortiz  holds a Ph.D. in English Literature from New York University, and a Bachelor  of Arts summa cum laude in English and German from Bowdoin College.  She is a member of Phi Beta Kappa. 
  • Her Experience

    Dr. Ortiz  joined the Oakcrest faculty as an English teacher and Assistant Head of School in 2009. She became Head of School in 2012.  While completing her doctorate, she taught writing and composition at NYU, and began a 15-year career of developing supplementary educational programs for girls throughout the U.S. Working collaboratively with educators and parents, she coordinated the creation and growth of programs that develop the whole person: camps, service projects, cultural and leadership programs, all of which offer spiritual formation through the Prelature of Opus Dei. 
  • Her Passion

    Dr. Ortiz has brought to Oakcrest her love of literature and the humanities, and experience and commitment to the education of young women. Mary especially enjoys being part of a school with such a noble purpose shared by each of the individuals who work here. She has a deep affection for her home state of Massachusetts, and fondness for the poetry of Elizabeth Barrett Browning.
Oakcrest School Heads Throughout the Years

1976-1979 Patricia O'Donovan 
1979-1984 Diane Hunter 
1984-1988 Biruta Meirans 
1988-1990 Ellen Cavanagh 
1990-2001 Barbara Falk 
2001-2012 Ellen Cavanagh 
2012-present Mary T. Ortiz
    • Patricia O'Donovan, first Head of Oakcrest School

    • Head of School Mary T. Ortiz (center) with members of the Board of Trustees and founding teacher Phyllis Savino (left) and founding parent and staff member Mary O'Keeffe (3rd from right).

    • Trustees Ellen Cavanagh, Lorrainne Anderson and Germana Mitchell after the memorial Mass for Helena Metzger on May 6, 2022.

Board of Directors

List of 10 items.

  • Michele Bueno (’99), President

    Michele holds a Master's degree in Electrical Engineering from Stanford University, a Bachelor of Arts in Physics from Smith College, and a Bachelor of Engineering Sciences from Dartmouth College. She has applied her technical skills at several different government contractors in the D.C. area and currently works as a software engineer. She also just recently completed a Master’s degree in Theological Studies at the Notre Dame Graduate School of Christendom College. She is the second alumna to serve on the Board of Directors.
     
  • Jan-Hein Cremers (Mary '27), Treasurer

    Jan-Hein has been working in portfolio management for over 15 years, leading teams that research and implement investment models trading public securities, including equities and derivatives. He started his career in Boston doing research in behavioral finance for large asset managers. He holds a bachelor's degree in physics from MIT and a Ph.D. in physics from Harvard University. Jan-Hein is married to Sandy, who is a practicing ophthalmologist. They have six children.
  • Gary Hale (Rebekah '11, Kathryn '16, Margaret '18, Anna '19, Brigid '21), Vice President

    Gary is currently CEO of Mpathic, LLC. and has over 25 years of leadership experience in technology companies such as UUNET Technologies, MCI, NetApp, and Amazon Web Services. He holds a Bachelor of Science degree in Mathematics from Virginia Tech. Gary and his wife Jennifer are the happy parents of nine children and four grandchildren.
  • Phil O’Beirne (Charlotte ‘24 and Maeve ‘28)

    Phil O'Beirne is an attorney in private practice in Washington, D.C.  Phil holds a bachelor's degree in history from Princeton University and a J.D., cum laude, from Notre Dame Law School.  Phil previously served for five years on active duty in the U.S. Army as a Judge Advocate, including a deployment to Kandahar Afghanistan in 2009-2010 with the 82nd Airborne Division. He and his wife Kathleen have five children.
  • Jim O'Boyle

    Jim is a member of the leadership gifts team in Princeton University’s Development office. He has more than 25 years of experience in educational fundraising, serving in senior administrative roles in colleges and independent high schools. His work with nonprofits has been widespread, including capital campaigns, strategic planning, board leadership and counsel, volunteer engagement, and marketing and publications efforts. 
     
    Jim is married to Mary Ellen O’Boyle, a Montessori teacher, and both share in the adventure of raising their 7 children.
  • Mary T. Ortiz (Head of School)

    Mary holds a Ph.D. in English Literature from New York University, and Bachelor of Arts from Bowdoin College. While completing her doctorate, she taught writing and composition at NYU, and began a 15-year career of developing supplementary educational programs for girls throughout the U.S.  Mary first joined the Oakcrest faculty as an English teacher and Assistant Head of School in 2009. She became Head of School in 2012, bringing to Oakcrest her love of literature and the humanities, and experience and commitment to the education of young women.
  • Michelle (Shelly) Heldreth Pelletier (Emma, ’19)

    Shelly holds a Juris Doctor from the Georgetown University Law Center and a Bachelor of Arts from Cedarville University. She had the privilege of working for the Honorable Henry Hyde at the House Judiciary Committee. She has served as the Coordinator for Women’s Discipleship at Arlington Baptist Church since 2009. Over the last eighteen years, she has served in a wide variety of volunteer positions at the schools her children have attended. Shelly has been on the board of the Oakcrest Parent Association for six years, most recently as its Chair.
  • Lucia Percovich (Carolina '25)

    Lucia holds a Master’s degree in Economics from New York University, and a Bachelor’s degree in Political and Social Science and a Master’s degree in Marriage and Family from the University of Navarre. She has actively participated in various non-profit organizations where she has raised funds for projects related to educational program improvements, in addition to leading various college and high school leadership and mentoring programs for girls. She is the founder and CEO of a growing real estate investment family business.
  • Moira Walsh

    Moira holds a Bachelor's degree in biomedical ethics from Brown University and a doctorate in philosophy from the University of Notre Dame. Her dissertation focused on the relationship of freedom and moral education, a topic that has continued to be a focus of her work.  She has taught ethics, logic, and other topics to students at the University of Notre Dame, Indiana University, Boston College, and Suffolk University, as well as to numerous groups wanting to learn more about philosophy for personal enrichment without seeking a degree. She has been pleased to have some Oakcrest alumnae among her students in these classes. She currently works in New York City with the Rosemoor Foundation and oversees continuing education programs in philosophy and theology for members of Opus Dei across the United States. 
     
  • Margaret “Meg” White (Adele ‘22, Mary ‘25, Monica ’27), Secretary

    Meg holds a Juris Doctor from George Mason University’s School of Law and a Bachelor of Arts in Politics from the University of Dallas.  Meg spent time on the Hill and at a think tank before going to law school.  She is the proud wife of an Army veteran and was honored to serve on the Department of Defense’s Defense Advisory Committee on Women in the Services. Meg was fortunate to spend most of her junior year of high school at Oakcrest and considers herself an alumna of sorts.  Her family’s move out of the metro area cut her time at Oakcrest short, but her parents returned to DC later and her two younger sisters are Oakcrest alumnae. In recent years Meg has served Oakcrest and her other children’s schools in a variety of volunteer roles and has run multiple successful fundraisers.