Sergei Sviatchenko is especially oriented towards architecture's modern expressions,[5] including Constructivism and the contemporary European Bauhaus movement.

[10] Sviatchenko has made a number of monumental art works, among others in Nokia's headquarters in Copenhagen (now Aalborg University Copenhagen|Aalborg University), at the educational institution Tradium in Randers, in Jyske Bank's headquarters in Silkeborg, Holstebro Sygehus (hospital), Skjern kirke (church), Poul Due Jensen Akademi (Grundfos), at Nykredit and Kraftvarmeværket (CHP plant), Viborg, Denmark, FC Midtjylland (Dream99) and ArtCenter Silkeborg Bad (sculpture park).

[18] Inspired by the avant-garde of constructivism and the Bauhaus school movement, a connection between architecture, photomontage, scenography, decoration, design solutions and clothing style is created in Sviatchenko's artistic expression.

His compositions are often created with a minimum of elements such as fragments of human figures, buildings or recognizable objects which are combined by the artist into a new sculptural form.

Collages by Sviatchenko have been displayed at exhibitions in Denmark, Germany, Italy, Austria, France, England, Canada, and the United States and published in magazines such as Dazed & Confused, AnOther, Kilimanjaro, Varoom, Elephant, Rojo, Viewpoint, Blueprint, DAMn, Euroman, LOFFICIEL, Stiletto, Arena, Neon, Free & Easy and many others.

[22] The concept Less-collage emerged in the 2000s as a trend within modern conceptual collage and was introduced for the first time by Sergei Sviatchenko in 2004.

What is unique about Sviatchenko's Less-collages and characteristic of his imagery are firstly the distinct cut in selected images and secondly the number of elements in the collage which deliberately is minimized to two or three at the most.

The original idea was carried out in a number of paintings first displayed at the exhibition "Ukrainian Art 1960-80s" which opened in Kiev in 1990 and then in Fyns Kunstmuseum in Odense.

The principal artwork from this series was called "Joy Beyond the Mountains" (1989), which was inspired by the painters from the so-called Peredvizhniki cooperative ("The Wanderers" 1870–1923).

Sviatchenko showcased this early series in full at FIAC – The international contemporary art fair in Paris in 1994 and at Galleri NORD (Randers, Denmark).

The style mostly associated with Sviatchenko is especially characterized by an abstract expressionism with markings of landscape motifs applied with a significant palette and often with an atmosphere of contemplative repose pointing to the artist's preoccupation with the catharsis-theme.

[25] Moreover, lines and sketchings of architectural figures are an element of many paintings, and in recent years Sviatchenko has experimented by including features from collage in characteristic mixed media.

Close Up And Private has collaborated with brands such as Costume National, Gant Rugger, Dickies, Mismo, Jack & Jones by Premium,[27] Harris Tweed, AN IVY, S.T.

According to an opinion poll conducted by the magazine EUROMAN,[28] Sviatchenko has several times been voted "best-dressed man in Denmark" in 2010, 2014 and 2019.