This is the second time she has served as president since she took office in 2005. She is in her second term as District 5 supervisor.
Supervisor Don Horsley, who is serving his second year representing District 3, was appointed the board's vice president.
Mr. Horsley joined Ms. Tissier in praising outgoing board president Carole Groom for her leadership in the past year, during which the board enacted budget cuts and approved plans for a new county jail.
Ms. Tissier said the main issues the board will grapple with in 2012 include the county's ongoing structural budget deficit, realignment, and furthering opportunities for economic development.
"It's going to be a bit daunting because we still have a lot on our plate," she said.
She announced a change in how the board will do business. It will take on budget and policy issues in the morning and land-use issues in the afternoon. That should reduce time members of the public wait to hear a particular issue, a board spokesperson said. Also, the board plans more workshops around substantive issues.
Ms. Tissier served two terms on the City Council in Daly City before her election to the Board of Supervisors. In addition to board president, she will serve as chair of the Metropolitan Transportation Commission and chair of the Joint Powers Board that oversees Caltrain.
Tim Brady chairs Woodland School board
Woodland School parent Tim Brady of Portola Valley was named chair of Woodland School's board of trustees in the fall, replacing David Spreng, who had served on the board since 2006.
Mr. Brady is a founding partner of Imagine K12, a company that is working to change kindergarten through 12th-grade education using new technologies. He has served on the Woodland Board of Trustees since 2009.
Woodland is a private preschool through eighth-grade school in Ladera with 260 students.
"We are at a pivotal point in the school's 30-year history, with many of the decisions that the board makes this year determining the future of the school," said John Ora, the head of school.
Prior to his work with Imagine K12, Mr. Brady was the chief executive officer of Questbridge, an Internet-based nonprofit organization that connects high-achieving, low-income students with top colleges and universities.
Mr. Brady also worked at Yahoo!, where he held several positions, the last of which was chief product officer, and at Motorola in Tokyo. He has an MBA from Harvard University and a bachelor's degree in electrical engineering from Stanford University.
Mr. Brady takes the helm from David Spreng, whom school officials credit with helping bringing the school in line with best practice standards for fiscal planning and financial management, increasing student enrollment by 20 percent, receiving accreditation by the Western Association of Schools and Colleges, joining the National Association of Independent Schools, and expanding the use of technology throughout the school.