Meet the connected, creative storytellers behind Tiny Windows.


  • Nonprofit veteran and organizational strategist Miriam Brosseau founded Tiny Windows in late 2018. “Communication is an act of creation,” says Miriam. “How we listen to, tell, and elicit stories is what makes our organizations stronger.”

    Miriam Brosseau is CEO & Principal of Tiny Windows, and feels pretty great about that.

    Before launching Tiny Windows in 2018, Miriam spent 12 years working inside nonprofits including running the Jewish TED-style platform ELI Talks (as its first Program Director). As Chief Innovation Officer of See3 Communications, she consulted with a wide range of organizations including Make-A-Wish America, the BUILD Initiative, and the Alzheimer's Association.

    In addition to her consulting work, Miriam is an adjunct marketing instructor at the University of Chicago's Graham School, podcaster, and singer/songwriter.

    Miriam holds a Masters in Jewish Professional Studies from Spertus Institute, and certifications in Storytelling for Influence from IDEO and Content Marketing from Hubspot. She is a member of the ROI network of young Jewish entrepreneurs and the Nonprofit Technology Network, and was named to the Jewish Week’s “36 Under 36” in 2013 and Chicago’s “Double Chai in the Chi” in 2019. Her work has been published in NPEngage, Beth’s Blog, Crackerjack Marketing, eJewishPhilanthropy, and other prominent nonprofit and marketing publications. She proudly sits on the boards of the Jewish Studio Project and her local congregation.

    Get more of Miriam’s backstory and approach to creativity on the Hevria podcast. Or, hey! Miriam was profiled for the 2021 book “Bless Our Workforce”; read a selection here. You can also listen in on her teaching storytelling on the 1832 Communications podcast, or on the AFPQ podcast.

    In "real life," Miriam is mom to two gorgeous humans and spends her free time reading, drinking too much coffee, and roller skating. She was once a finalist in a Passover parody contest. She would love if you would recommend a good novel.

    Follow Miriam on LinkedIn to get to know her and her work better.


  • Angel (he/him) is a transformational leader who specializes in scaling organizations and building robust operational infrastructures that drive systemic change. Throughout his career, he has consistently developed and implemented organizational frameworks that enable nonprofits to expand their impact and better serve their missions. As Chief Operating Officer of Repair the World and Senior Director of Operations for the Jews of Color Initiative, he architected systems that allowed both organizations to significantly expand their reach while advocating for racial equity in the US Jewish community.

    With over two decades of nonprofit leadership experience, Angel has distinguished himself as a changemaker who combines strategic vision with operational excellence. His unique approach draws from his diverse educational background in Business Administration from St. Mary's College of California and Graphic Design from the Art Institute of California, San Francisco. This multidisciplinary perspective informs his innovative solutions to organizational challenges.

    Angel's commitment to creating lasting change extends to his board service with organizations like Keshet, JPro, SVARA, Kavod v'Nichum, and Recustom, where he continues to shape organizational strategies and structures. Based in Los Angeles's Pico-Robertson neighborhood, he shares his life with his wife, Danielle Natelson, finding joy in their community and traditions, including baking challah for their weekly Shabbat celebrations.


  • Rosie Powers (she/her) is a mission-driven strategist who works with nonprofits across brand, website, and digital marketing strategy. Equal parts storyteller, data nerd, and project manager, she enjoys the intersection between “big idea” thinking and metrics analysis that helps nonprofit brands communicate their impact and engage audiences. In her work with the agency Mission Minded, she collaborated with organizations such as Housing Trust Silicon Valley, Packard Foundation, Ibis Reproductive Health, Pritzker Traubert Foundation, and Wu Yee Children’s Services.

    Rosie’s roots in storytelling began with her career as a journalist working in newsrooms with the Washington Post, the Chicago Sun-Times, and ABC before moving into nonprofit communications. She then worked in marketing leadership with Chicago-based nonprofit Greenheart International.

    In her spare time, Rosie enjoys volunteering with the Chicago chapters of the Sierra Club and the Planetary Society.


  • Yudi (he/him) dedicates his time at Tiny Windows to making sure the whole team runs smoothly, making sure everyone has the tools, tech, and process to do their job well.

    He is also a singer/songwriter and teacher of Jewish texts, both of which focus on the teachings of Rebbe Nachman of Breslov.

    In addition to working for TWC, making music, and exploring the corridors of the supernal realms, Yudi is “tatti” to two excellent kiddos and husband to Miriam.

    Learn more about his music and listen to his classes here.


  • Josefin Dolsten-Kuhel (she/her) is a senior communications leader with more than a decade of experience in media, PR and strategy.

    Recognized as top LGBTQ+ PR leader by PR Week, she is an expert in helping mission-driven organizations raise awareness about their work and navigate complex issues.

    Josefin has worked with major nonprofits and social impact organizations, including the Gates Foundation, Robert Wood Johnson Foundation, GoFundMe, Moms Demand Action, Native Forward Scholars Fund, Vera Institute of Justice, Center for AI Safety, and others.

    She has secured hundreds of media placements for clients to increase awareness, drive donations, and build political support, including in the New York Times, MSNBC, CNN, TIME, The Economist, New York Jewish Week, and the Forward.

    A former reporter with bylines in the Daily Beast, PR Daily, Refinery 29, and JTA, Josefin has unique insight into how reporters think and has successfully trained dozens of spokespeople, including C-suite corporate and nonprofit leaders, on how to handle tricky interviews. She also brings expertise in crisis communications, helping organizations emerge stronger when faced with challenges.

    Josefin serves as a board member of Cornell University’s LGBTQIA+ Alumni Association and the Jewish Democratic Council of America’s New York network. She lives in New York with her wife, Tali.


  • Elisheva Thompson (she/her) is a marketing and communications consultant who specializes in elevating the story and reach of faith-based communities. With two decades of experience in design and communications, she has led strategic marketing, brand development, internal communications, and systems-building initiatives across a variety of sectors. She is particularly passionate about giving Jewish communities a clear, confident voice and a strong public presence. Her consulting practice focuses on helping Jewish nonprofits develop inspiring brands, effective communications strategies, and the internal systems that support healthy, mission-aligned cultures. Prior to launching her consulting practice, Elisheva worked with UpStart, a national marketing agency, and numerous synagogues to strengthen their communications and organizational infrastructure.


  • A lifelong learner, educator, and advocate, Sierra (she/her) has a passion for making a positive impact. Her academic journey, including a master's degree from the University of Chicago Divinity School and a BA in Anthropology from the University of Nevada, Reno, reflects her deep curiosity about the historical ties between American Judaism, Israel/Palestine, and the intersections with Black liberation movements.

    Sierra was formerly an HR Specialist at Capital Insurance Group and a Jewish youth professional working with congregations and organizations like the Union of Reform Judaism. She spends much of her time now as an instructor at Truckee Meadows Community College, and a dedicated volunteer with Between Horses and Humans, a nonprofit in Northern Nevada. More than a service provider, Sierra is deeply invested in the fight for the liberation of all peoples.


  • Bio coming soon.


  • Sam Powers (he/him) is a multifaceted musician, educator, and strategist. Originally from the suburbs of Chicago, Sam moved to Boston in 2018 to study Professional Music at Berklee College of Music, concentrating in Mandolin Performance and Music Business. While in school, he toured as a professional mandolin player and managed his own award-winning Americana group, The Bad Oats. After graduating from Berklee, Sam served as a Youth Engagement Specialist at Temple Beth Elohim in Wellesley and as a Youth Educator and Music Specialist at Temple Beth Shalom in Needham. He is currently a second-year graduate student in the Hornstein Program at Brandeis University, where he is pursuing an MBA and a Master’s in Jewish Professional Leadership. 

    Outside of a rigorous schedule of consulting and school, Sam can be found playing bluegrass and old-time music all over New England.


  • Sumner Lewis (she/her) is a Manhattan based Jewish professional, content creator, and musical theatre performer. She combines her background in community building and program management with her love for the internet to support Jewish organizations in being their best selves and finding their audience online.


    Self described as chronically online, she has created internet challenges to promote campaigns, produced vertical video segments for weekly engagement, ghostwritten captivating content, grown followings, and connected audiences to meaningful programming.

    Previously, she has worked in various roles at the URJ, Dayenu, Ammud: The Jews of Color Torah Academy, Hey Alma, and Upstart. Sumner has a BA in Political Science with a concentration in International Studies from Westfield State University with a triple minor in History, Communications, and Ethnic & Gender Studies.

    She can typically be found performing in a cabaret at 54 Below, trying to ace her weekly trivia game, or walking around Central Park with a hot chocolate.

  • Gulienne Rollins-Rishon is a biracial Ashkenazi and Black American speaker who facilitates dialogue about race, religion, and cultural identity. Her organization HypheNation evolved from a high school newsletter into a platform for diversity workshops. With a B.A. in Communications and African & African Diaspora Studies, she's led discussions at Harvard and Orthodox synagogues.

    Previously Racial Justice Specialist at USCJ and Social Justice Project Manager at Rabbinical Assembly, Gulienne now works independently on cultural fluency. Based in Philadelphia, she helps organizations and individuals discover the power of their unique stories.


  • Zoey Waldman-Schein (they/them) engages in work that spans across disciplines emphasizing music, education, non-profit development, and social justice facilitation. In addition to their work at Tiny Windows, their roles include music educator at Temple Emmanuel, ECC/Family Center Songleader at the St. Louis JCC, B Mitzvah tutor at Congregation Beth Shalom, and SLBC’s Director of Community Connection and Middle/Day School Chavurah. They are the current Co-President of the board of CHARIS, St. Louis’ LGBTQ+ treble chorus.
     
    Zoey is a graduate of Webster University where they completed a bachelor’s degree in Choral/General Music Education with a minor in Women’s, Gender and Sexuality Studies.