Seth Voelker
Seth Voelker was born in Kenosha, Wisconsin and grew up to become an economics professor. He failed to make tenure and was hired by the Roxxon Oil Company as an economic analyst. He discovered their criminal schemes and they permitted him to apply for mutagenic alteration.[2][3] As the professional criminal Sidewinder, he was originally hired by Roxxon to retrieve the Serpent Crown. Alongside the third incarnation of the Serpent Squad, Sidewinder was able to return the crown to company president Hugh Jones, after a battle with the Thing, Stingray, Triton, and the Scarlet Witch.[4] However, after his stint working for Roxxon, he decided to form his own criminal organization, the Serpent Society. He organized the Serpent Society, conducted initiation tests, and contacted potential clients. In the Society's first mission, Sidewinder dispatched them to kill MODOK on behalf of AIM.[5] With the ability to teleport, Sidewinder promised his recruits they would never be imprisoned. This attracted several snake-themed villains, and the Serpent Society was quite successful, much to Captain America's frustration. He also had a romantic relationship with Black Mamba.
In the Serpent Society's next mission, Sidewinder dispatched them against Captain America, and Sidewinder freed them from prison after their capture.[6] He dispatched the Society to hunt down the Scourge who had murdered Death Adder.[7] Sidewinder later rescued Black Racer, Copperhead, Fer-de-Lance, and Puff Adder from jail, and enlisted them in the Serpent Society.[8]
Sidewinder was betrayed by his organization after Viper infiltrated the group. After being poisoned, he was aided by Diamondback and the two survived.[9] He then freed Diamondback and Nomad from Commission custody.[10] With Diamondback, he stole an artifact from Mister Jip on behalf of clients Ghaur and Llyra.[11] He rescued Diamondback from execution by the Serpent Society. He helped Black Mamba and the Asp escape King Cobra's grasp, and fled King Cobra's reprisals.[12] Sidewinder later unsuccessfully attempted to make peace with King Cobra by freeing him from the Vault.[13]
Sidewinder retired from villainy in order to allow Captain America to help him get money for his daughter who was ill with cancer.[14]
Some time later, Sidewinder was seen in an interview after his retirement from villainy.[15]
Gregory Bryan
Gregory Bryan had been turned into the new Sidewinder by the Brand Corporation under the orders of Hugh Jones and was a member of the Serpent Society. After Gregory left, Cobra used the Brand Corporation's equipment (which had been long stolen by the Serpent Society) to create more Sidewinders.[17]
Upon being improved, Sidewinder later sprung the other Serpent Society members from their cells.[18] After the group had captured and chained Captain America and Diamondback (who was really an L.M.D.) in this underground New York headquarters, the pair escaped. Sidewinder was knocked out by "Diamondback". S.H.I.E.L.D. subsequently took Sidewinder and the rest of the Society into custody.[19]
During the Secret Invasion storyline, Sidewinder re-joined the Serpent Society. The Society held a number of civilians hostage in a compound in the American Midwest claiming they were protecting themselves from the Skrulls. However, they were easily defeated by Nova and his new Nova Corps.[20]
As part of the All-New, All-Different Marvel event, Sidewinder appears as a member of Viper's Serpent Society under its new name of Serpent Solutions.[21]
During the "Opening Salvo" part of the Secret Empire storyline, Sidewinder was with Serpent Solutions at the time when they are recruited by Baron Helmut Zemo to join his Army of Evil.[22]