Langmead began his career as a trainee at Preston North End. He spent a month on loan to Tamworth in the Football Conference, where he played two matches in September 2003. Later in the same season Preston loaned him to then Division 3 club Carlisle. He played 11 matches, with his league début coming in a 4–1 defeat at Torquay on 6 March 2004. His first goal was at Mansfield in a 3–2 win on 24 April. In September 2004 Langmead was again sent out on loan, this time to Kidderminster Harriers in the newly named League Two. He played 11 matches for the Harriers and scored one goal. He returned to Preston to make his only appearance for the club, coming on as a substitute in the Championship game against Millwall.
Shrewsbury Town
Two weeks after his Preston début, he debuted for Shrewsbury, shortly after the appointment of former Preston manager and youth development chief Gary Peters as Shrews manager. Langmead played just three matches for the Shropshire club before making the move a permanent one, signing on a free transfer. Langmead then made more than 80 appearances in League Two for Shrewsbury as a striker, and although far from prolific, he improved his scoring rate. In September 2006, after noticing his aerial ability when defending corners, Gary Peters trialled him at centre-back in a reserve fixture. He was then utilised in this position for the first team, and was recognised in the League Two team of the week for his performance against Macclesfield Town on 6 October 2006. Langmead's success in this position saw him play out the rest of the season at centre-back, as Shrewsbury reached the League Two play-off final. Langmead also earned the Player of the Season award as voted for by both players and fans, for his consistency that term. The following season, Salop's first at the New Meadow was not quite as successful for Langmead. With frequent changes of central defensive partner, his form suffered somewhat. He missed the final seven games of the season due to an operation on an injured knee, but returned to fitness in time for the start of pre-season training. At the start of the 2008–09 season, Langmead struggled to gain a place in the first team, as Paul Simpson preferred a central defensive partnership of Mike Jackson and Graham Coughlan. However, in the latter half of the campaign he regained a regular place, playing alongside Coughlan at the heart of the defence. The season ended in heartache for Langmead as Shrewsbury lost in the League Two play-off final for the second time in three years. In June 2009 he signed a new two-year contract.
On 24 June 2010, he was sold to Peterborough United on a three-year deal for an undisclosed fee. On 7 August 2010, he made his debut in a convincing 3–0 home win over Bristol Rovers. He was virtually ever present for Peterborough United under Gary Johnson, however he fell out of favour under new manager Darren Ferguson, who preferred to partner Ryan Bennett and Gabriel Zakuani at centre-back.
After his release from Northampton, Langmead dropped into non-league football. After a spell at Ebbsfleet United, then a season-long loan at Kidderminster Harriers, he joined Nuneaton Town in summer 2016.
