Short Bio
Dr Mary Ann Horton is a transgender activist, an author, an internet pioneer and a computer architect. She earned her PhD in Computer Science from UC Berkeley, spent 20 years with Bell Labs and retired from San Diego Gas & Electric, where she protected the power grid from hackers. In 1997 she persuaded Lucent Technologies to be the first Fortune 500 company to add transgender-inclusive language to their nondiscrimination policy, earning her the Trailblazer Outie Award, and inspiring her to write her memoir “Trailblazer: Lighting the Path for Transgender Equality in Corporate America”. Visit her web site at maryannhorton.com.
Short Bio for Trans Audiences
Dr Mary Ann Horton is a transgender activist, an author, an internet pioneer and a computer architect. She earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she invented the email attachment and led Usenet, an early social media network. At Bell Labs, she made email easier to use, brought user@domain.com email to the have-nots in 1986, and published Internet standards for email and Usenet. In 2001 she conducted a research study that proved the addition of transgender medical coverage would cost companies virtually nothing.
Bio for Lutheran Audiences
Dr Mary Ann Horton is a transgender activist, an author, an internet pioneer and a member of First Lutheran Church in San Diego. She earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she invented the email attachment. She was the first transgender member of Lutherans Concerned (now ReconcilingWorks) back in 1998.
In 1997 she persuaded Lucent Technologies to be the first Fortune 500 company to add transgender-inclusive language to their nondiscrimination policy, earning her the “Trailblazer” Outie Award, and inspiring her to write her memoir “Trailblazer: Lighting the Path for Transgender Equality in Corporate America”. SoCal Lutherans awarded her the 2025 Clarence E. Anderson Peace and Justice Award.
Long Bio for Lutheran Audiences
Dr. Mary Ann Horton is a long time member of First Lutheran Church in San Diego, and a pioneering figure in both the world of technology and the movement for LGBTQ+ inclusion within the Lutheran community. Her journey is one of faith, advocacy, and a commitment to creating a more welcoming church for all.
Mary Ann’s technical achievements are significant. She earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she made groundbreaking contributions, including the invention of the email attachment and leadership of Usenet, an early social media network. Her work at Bell Labs further solidified her influence, as she played a crucial role in making email more accessible and established internet standards for email and Usenet.
However, it is her advocacy within the Lutheran church that resonates with this community. In 1998, Mary Ann became the first transgender member of Lutherans Concerned, now known as ReconcilingWorks. Her personal journey helped to educate and transform hearts within the church. She worked to bridge the gap between understanding and acceptance, often being the only transgender voice present in important conversations.
Her efforts to include transgender individuals in the “Reconciling in Christ” program was a pivotal moment. She recognized that while many Lutheran congregations were welcoming to gay, lesbian, and bisexual individuals, transgender people were often overlooked. Through her presentations, panels, and direct engagement with church councils, she helped to foster a deeper understanding of gender identity and expression and the importance of full inclusion. Her commitment to justice and equality led to the inclusion of transgender individuals in the “Reconciling in Christ” program. Her work led SoCal Lutherans to award her the 2025 Clarence E. Anderson Peace and Justice Award.
Her memoir, "Trailblazer: Lighting the Path for Transgender Inclusion in Corporate America," details her experiences and highlights her dedication to creating inclusive spaces. She believes that the church, like the workplace, should be a place where all are welcomed and affirmed. Mary Ann’s life is a powerful example of how faith and advocacy can come together to create meaningful change, inspiring others to work towards a more just and loving community.
Long Bio for About the Author
Mary Ann Horton, PhD, is a transgender activist, computer systems architect, Internet pioneer, entrepreneur, author, and speaker. In 1997, she persuaded Lucent Technologies to become the first Fortune 500 company to add transgender-inclusive language to its nondiscrimination policy, and to add coverage for transition care and surgery. Her work, which was soon replicated at Apple and Avaya, led Out & Equal Workplace Associates to present her with the 2001 Trailblazer Outie Award.
Mary Ann founded several transgender social and activist groups. She conducted a research study that proved the addition of transgender medical coverage would cost companies virtually nothing. She has been featured in the Daily Beast, Out Magazine, Google Arts and Culture, Salon, Diversity Factor, SHRM, L-Mag, Nokia, Faces of Open Source, and Out TV.
Mary Ann earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she created the first email attachment tool and led Usenet, an early social media network. At Bell Labs, she made email easier to use, brought user@domain.com email to the have-nots, and published Internet standards for email and Usenet.
She is the author of technical reference books including Portable C Software, and of the viral Internet parody, “How the Grinch Stole Marriage.”
Trailblazer is her debut memoir. Visit her website maryannhorton.com.
Tiny Bio
Dr Mary Ann Horton, is as a transgender activist whose work to bring transgender equality and benefits to the workplace earned her the Trailblazer Outie Award.
Oral Bio for introductions
Dr. Mary Ann Horton, is a transgender activist, computer systems architect, Internet pioneer, author, and speaker. In 1997, she persuaded Lucent Technologies to become the first Fortune 500 company to add transgender-inclusive language to its nondiscrimination policy, and to add coverage for transition care and surgery. Her work, which was soon replicated at Apple and Avaya, led Out & Equal Workplace Associates to present her with the 2001 Trailblazer Outie Award.
Mary Ann conducted a research study proving the addition of transgender medical coverage would cost companies virtually nothing.
Mary Ann earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she invented the email attachment and led Usenet, an early social media network. At Bell Labs, she published Internet standards for email and Usenet.
Her memoir "Trailblazer: Lighting the Path for Transgender Equality in Corporate America", is available on Amazon.
Oral Bio for SDG&E introductions
Dr. Mary Ann Horton, is a transgender activist, computer systems architect, Internet pioneer, author, and speaker. In 1997, she persuaded Lucent Technologies to become the first Fortune 500 company to add transgender-inclusive language to its nondiscrimination policy, and to add coverage for transition care and surgery. Her work led Out & Equal Workplace Associates to present her with the 2001 Trailblazer Outie Award. Her memoir "Trailblazer: Lighting the Path for Transgender Equality in Corporate America", is available on Amazon.
Mary Ann earned her PhD in Computer Science from the University of California at Berkeley in 1981, where she invented the email attachment and led Usenet, an early social media network.
Mary Ann joined SDG&E Grid Operations in 2007, where she developed tools for EMS operations, Cybersecurity, and NERC CIP compliance. She retired in 2018 and is currently a consultant for EMS operations.