The only child of Oscar Niemeyer, she worked with her father to design the civic buildings for Brasília, focusing primarily on interior spaces and decoration.

[12] Beginning in 1970, Niemeyer, in collaboration with her father, began producing furniture, based on a Swedish technique using plywood and glue to create curved forms.

[14] The oversized chair, with a stool, "Alta" was designed by Niemeyer and featured a curved steel frame over which the seat and backrest were mounted on wood and upholstered with leather.

The furniture she produced included stationary and rocking chairs, couches and longues and tables, of which most were originally designed for her father's architectural projects.

[5][15] A Japanese firm, Tendo Brasileira, operating in Brazil, was initially given exclusive production rights[16] and each piece was issued a unique serial number to prevent forgeries.

The main support allowed the chair to rock and provided balance, while the smaller elements braced the head and foot of the seat.

[8] In the 1980s, Niemeyer began a relationship with Carlos Magalhães da Silveira, an architect with whom she had worked at NOVACAP and who also was a business partner of her father.

[19] In 2010, Niemeyer was called by President Luiz Inácio Lula da Silva to assist in returning the interior of the Alvorada Palace back to its original presentation.

Searching through archives and government properties, first lady Marisa Lula oversaw the project in which she discovered through Niemeyer that the original chairs, thought to have been Mies van der Rohe creations shipped from Barcelona, were in fact copies made by Niemeyer, as there was no money to buy the 1929 originals or have them shipped.