Sylvia May Mailman (née Davis; born June 4, 1988) is an American political advisor and attorney who served as deputy assistant to the president and senior policy strategist from January to August 2025. Mailman served as the deputy solicitor general of Ohio from 2021 to 2023.

Mailman graduated from the University of Kansas and Harvard Law School. She clerked in the Court of Appeals for the Tenth Circuit from 2016 to 2017. Mailman served several positions in the first Trump administration, including assistant staff secretary, associate staff secretary, and deputy policy coordinator. She began serving as the deputy solicitor general of Ohio by March 2021, but left the role two years later. Mailman was named as director of the Independent Women's Law Center in January 2021.

In January 2025, Mailman was named as deputy assistant to the president and senior policy strategist. She left the second Trump administration in August to start her own government affairs firm.

Sylvia May Davis^[1] was born on June 4,^[2] 1988.^[3] Davis is the daughter of Duncan and Kyungae Davis. They met while Duncan was administering vaccines in South Korea in the 1980s. Davis was raised in Goodland, Kansas, and later moved to Clay Center.^[3] She graduated from Clay Center Community High School in 2006. Davis later graduated from the University of Kansas with a bachelor's degree and from Harvard Law School^[4] in 2015.^[3]

After graduating from Harvard, Mailman moved to Denver and worked for a law firm.^[3] She clerked in the Court of Appeals for the Tenth Circuit for Timothy Tymkovich from 2016 to 2017.^[5]

By April 2017, Davis had been named as an assistant staff secretary in the White House. That month, she was honored by the National Association of Asian Pacifics in Politics and Public Affairs in its "40 Under 40" list.^[6] By June 2018, Davis had been named special assistant to the president and associate staff secretary;^[7] that month, she was named deputy assistant to the president and deputy policy coordinator.^[8] In April 2019, The Washington Post reported that Davis had written an email to U.S. Customs and Border Protection, Immigration and Customs Enforcement, and Department of Homeland Security officials in November—amid an incoming caravan of migrants—discussing a proposal releasing migrants to sanctuary cities.^[9] Davis began working in the Office of White House Counsel prior to the COVID-19 pandemic.^[5] Emails released by the House Select Subcommittee on the Coronavirus Pandemic in April 2022 showed that Davis sought to remove guidance from the Centers for Disease Control and Prevention advising churches to hold religious services virtually in May 2020.^[10]

Davis resigned from her White House position in the days after the January 6 Capitol attack.^[3] By March 2021, she had begun serving as the deputy solicitor general of Ohio. That month, Davis had got engaged to David Mailman, a former professional baseball player.^[11] The two moved to Houston,^[3] got married in June,^[12] and had three children, born in 2022,^[13] 2024,^[14] and 2025.^[15] May served as director of the Tenth Amendment Center for Ohio. She had left both roles by July 2023.^[16]

In February 2021, Davis was named as a fellow of the Independent Women's Forum.^[17] She had become the group's senior legal fellow by April 2023^[18] and—after serving as vice president of Restoring Integrity and Trust in Elections—was named as the director of the Independent Women's Law Center in January 2024.^[19] Mailman opposed president Joe Biden's revised Title IX rules that redefined gender identity and stated that the organization would sue the administration.^[20] She served as the head of RBG PAC, a super PAC that used over $20,000,000 donated by Elon Musk to run advertisements that targeted women between the ages of 18 and 45, seeking to associate Supreme Court justice Ruth Bader Ginsburg's stance on abortion with Donald Trump's stance.^[21]

On January 18, 2025, Mailman was named as deputy assistant to the president and senior policy strategist.^[4] According to The New York Times, she assisted the Trump administration in forming its education policy^[22] and encouraged attorney general Pam Bondi to prosecute doctors who perform gender-affirming surgeries using a law against genital mutilation.^[23] In May, CNN reported that several universities had privately began to negotiate with Mailman to avoid punitive action from the Trump administration.^[24] Mailman was involved in negotiations to secure settlement agreements with Columbia University, Brown University, Cornell University, Northwestern University, and Harvard University, among other schools.^[3]

On August 3, 2025, CBS News reported that Mailman had left the Trump administration two days prior to start her own government affairs firm.^[25]