The Bombers, who currently don't have a vacant list opening for next season, will trial multiple players at Tullamarine across their pre-season program as they weigh up their options for the Supplement Selection Period.
Given father-son draft addition Jayden Davey is expected to miss the entirety of next season due to a knee injury, Essendon could move the teenager to their inactive list to open up an opportunity for a potential SSP recruit.
The Bombers are already trialling Western Australian key forward Reuben McGuire and former Western Bulldog Brad Lynch this pre-season, with Szybkowski the latest to join Brad Scott's squad for the coming months, according to CODE Sports' Paul Amy.
Szybkowski, a big-bodied midfielder, is seen as arguably the best draft prospect overlooked in last week's National and Rookie Drafts following a strong season with the Dandenong Stingrays.
His clean hands and strong inside game is what had Szybkowski so highly touted early into this year, with the Stingrays captain initially seen as a potential top-10 selection.
The 186cm and 86kg onballer averaged 23.5 disposals, 5.0 marks, 3.8 tackles in the National Championships with Vic Country in 2022.
Martin was an SSP recruit for the Bombers this year after training with the Dons last off-season, having an instant impact at AFL level, booting five goals on debut against Geelong.
The 2023 SSP window will run until February 15.