He joined League Two club Lincoln City on a loan deal until the end of the 2006–07 season, to help The Imps in their promotion push.

[citation needed] However, on 30 May 2007, Olejnik was released by Villa manager Martin O'Neill and the following day joined Scottish club Falkirk.

Olejnik made his debut for the club in a 1–0 win over Kilmarnock on 2 January 2008, coming on a substitute for Russell Latapy after Krul got sent off for unsportsmanlike conduct.

Krul would later return to his parent club after suffering a shoulder injury[8] and Olejnik would later become a first choice goalkeeper for the rest of the season.

[9] The following season with Mallo left Falkrik, Olejnik resumed his first choice goalkeeper status, having played all 38 games in the league.

In a 0–0 draw against Aberdeen, Olejnik was in a confrontation with team-mate Scott Arfield, who he believed had not properly defended a cross.

[13] In April 2012, Olejnik was named in the PFA Team of the Year for League Two along with teammate Kevin Nicholson, Eunan O'Kane and Lee Mansell.

The save he made in the first-half was outstanding, but he also gives us something we haven't had from our goalkeepers in recent seasons and that's excellent communication skills".

[19] During the first leg of the 2013–14 League One play-off semi-final against Leyton Orient, he was awarded Man of the Match for a performance which helped Peterborough draw the game 1–1.

On 19 July 2014 Olejnik signed on a 28-day emergency loan with Scunthorpe United and made his debut against Fleetwood Town on the same day.

[24] Olejnik joined League Two York City on loan until the end of the 2014–15 season on 5 January 2015, being reunited with manager Russ Wilcox, who had signed him for Scunthorpe.