[1] In periods during his studies, he worked as a laborer: in West Germany in 1965 on the renovation of the Cologne Cathedral, and in 1968 in the Netherlands, where he participated in local protests against the Warsaw Pact invasion of Czechoslovakia.

[2] From 1969, he was employed during the following ten years in the progressive SIAL studio in Liberec, led by architects Karel Hubáček and Miroslav Masák.

[5] Between 1979 and 1986, Rajniš collaborated through Studio Shape founded by Jaromír Hník on designs and management of exhibitions for largely foreign clients.

[4] Via this arrangement, Rajniš designed the History of Transport pavilion at the World Exhibition EXPO 1986 in Vancouver together with Hník, Petr Hořejš and Jiří Černý.

Studio with colleagues Markéta Cajthamlová, Lev Lauermann, who were subsequently joined by Stanislav Fiala, Jaroslav Zima, Tomáš Prouza and Jan Mleziva.

[11] In 2021, the authorities of Prague awarded Rajniš with the honorary medal of the capital city for significant lifetime achievements in the field of architecture.

[12] Early works of Rajniš dated from the 1980s and 1990s have an international modernist or functionalist aesthetic of high-tech style[4] inspired by neo-functionalism and brutalism.

[13] In the period following 2000, Rajniš shifted the materiality and aesthetics of his designs from steel and concrete to "naturalistic" wood, stone and glass, resulting in experimental and organically shaped structures.