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Harmony for your home, business and life.


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Woman-owned and operated for 20 years, Seriatim is Manhattan’s leading team of professional organizers. We plan, orchestrate, get the details organized for you so that the job gets done and you can come out one step ahead.

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Seriatim, which is Latin for “in a series,” is a New York-based company that provides organization and inventory management solutions for businesses and individuals in transition. We specialize in creating a detailed processes and workflows that create harmony, and help prioritize your needs in a simple and productive manner.

Since 1999 our team of professional organizers, led by Sonya Weisshappel, have specialized in creating harmony amidst a variety of transitions, including the birth of a child, death of a loved one, an overseas move, corporate merger, office relocation, and every other life event that can create stress and disorganization. We understand how difficult transitions and organization can be; our mission is to serve as your support system through the many stages of these processes. Whether we're implementing a digital inventory, assisting with mergers, creating baby “zones” for new moms, assisting a widow, unpacking a five-bedroom home, or coordinating a cross country or local move, we help people move forward in a supported, positive direction. Seriatim can handle any project — big or small — with the expertise, sensitivity and professionalism necessary to get the job done.


Phone: 212 877 3267