Kingsbridge-born Ellis is an experienced defender with over a decade of professional playing experience.
Coming through the ranks at Bolton Wanderers, Mark left the Trotters without making a senior appearance, instead making his professional debut with Conference Premier club Torquay United in 2007. After a successful loan spell, he joined permanently in 2008 and helped the gulls to promotion as Conference Premier Play-off Winners 2008-09.
Despite spending the opening part of the following season on loan at Forest Green Rovers, Ellis remained at Plainmoor until 2012, at which point he decided to bring his time with the Gulls to a close after 136 appearances and 12 goals.
He joined League One Crewe Alexandra, for whom he played 92 times and scored 7 goals, helping the Alex win the 2012-13 Football League Trophy in the process. After 2 seasons at Gresty Road, Ellis dropped down to League Two Shrewsbury Town for the 2014-15 campaign.
Mark helped the Shrews bounce back from their 2013-14 relegation at the first attempt, playing 35 matches as they finished League Two runners-up to Burton Albion and secured automatic promotion back to League One.
Two loans to League Two Carlisle United in 2015-16 saw Ellis make 35 combined appearances for the Cumbrians and such was his impact, he secured a permanent transfer to Brunton Park in 2016. He only represented the Club 12 times during 2016-17, spending the latter portion of the season on loan at Forest Green Rovers, with whom he earned promotion to League Two after winning the 2017 National League Play-off Final — beating Tranmere 3-1 to do so.
Returning to Carlisle in 2017, he made just 10 further appearances for Keith Curle and, in 2018, was allowed to leave.
Mark signed a 2-year contract at Prenton Park, reuniting with former Forest Green Rovers teammate Manny Monthè in the Tranmere defence for 2018-19.
Ellis' influence, especially towards the second-half of the campaign, helped Tranmere secure a second successive promotion. Although he was injured for the concluding weeks of the campaign, he made 32 appearances in all competitions as Rovers won the 2018-19 League Two Play-off Final in his first year at the Club.
Interesting Fact: Tranmere Rovers represents the second time Mark has worked with Micky Mellon, having previously worked with the Rovers boss at Shrewsbury Town (2014-16).