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Phi Sigma Sigma

National Housing Corporation (NHC) Board of Directors


The Phi Sigma Sigma National Housing Corporation (NHC) is pleased to announce the newly elected Board of Directors. These women are entrusted with setting the strategic direction for the NHC in alignment with the Fraternity’s direction as a united entity of One Phi Sigma Sigma.


Past Grand Archon Katie Vlietstra Wonnenberg, Epsilon Delta Chapter at Chapman University has been elected president of the NHC. Additionally, Wendy Lau, Theta Upsilon Chapter at the University of La Verne and Lindsay Siolka, Iota Zeta Chapter at the University of Minnesota - Duluth, have joined the board as directors.

“With over a decade of previous experience on Supreme Council, Katie has a deep understanding of the business of the NHC, current challenges and the NHC’s role in the larger One Phi Sigma Sigma experience,” said Executive Director Michelle Ardern. “Katie successfully lead Phi Sigma Sigma through a particularly tumultuous triennium and her leadership will be instrumental as the NHC continues to navigate ongoing challenges resulting from the COVID-19 pandemic.”

The NHC Board of Directors includes:

  • President Katie Vlietstra Wonnenberg, Epsilon Delta Chapter at Chapman University

  • Vice President/Secretary Emily DeCarlo, Pi Chapter at Syracuse University

  • Treasurer Sandy Grossman, Gamma Nu Chapter at Rutgers University – New Brunswick

  • Director Barb Gentry, Epsilon Alpha Chapter at Illinois State University

  • Director Alicia Scott, Beta Psi Chapter at the University of Florida

  • Director Lindsay Siolka, Iota Zeta Chapter at the University of Minnesota - Duluth

  • Director Wendy Lau, Theta Upsilon Chapter at the University of La Verne

  • Ex Officio Michelle Ardern, Delta Iota Chapter at Central Michigan University

  • Ex Officio Tess Stovall, Kappa Chapter at The George Washington University

  • Legal Counsel Erin Sweeney, Beta Delta Chapter at Ohio University

The NHC Board of Directors works closely with Headquarters staff and volunteers to cultivate and promote a gracious living experience as a part of the premier membership experience.


Additionally, Phi Sigma Sigma would like to recognize the hard work and dedication of the Board of Directors and extend a heartfelt thank you to President Erin Sweeney and Director Darcy Burke for their service to the NHC. Erin Sweeney, Beta Delta Chapter at Ohio University, served as NHC president for the past 16 years and will continue her work with the NHC as legal counsel. Darcy Burke, Beta Omega Chapter at Portland State University, began her service on the NHC board in 2013. We thank both Erin and Darcy for their dedication and contributions to Phi Sigma Sigma.

“The past few years, the NHC Board of Directors demonstrated strong, unwavering leadership during an incredibly difficult and tumultuous term,” said Michelle Ardern. “The COVID-19 pandemic severely altered all aspects of Phi Sigma Sigma, but the NHC was the most impacted of Phi Sigma Sigma’s three entities. The board’s professional knowledge, diligence and ability to make difficult decisions helped ensure the NHC was able to weather the numerous challenges, navigate a return to campus and continue to provide the safe and gracious housing experience desired by our members.”

We believe that providing residential housing supports our organizational philosophy of providing a premier membership experience. Managed by a dedicated board of Phi Sigma Sigma volunteers, the NHC manages all housing efforts and works with supervising directors, local volunteers, contractors and suppliers to provide quality housing experiences for Phi Sigma Sigma sisters.

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