Maddy was born in Leicester, UK. Initial studies at the Birmingham Conservatoire gained Maddy a BA (Hons) Music 2:1, A.B.S.M (composition with merit) and a Postgraduate diploma in Professional Studies (Performance), the Conservatoire BA Prize and the award for an Orchestral Composition. A Countess of Munster Musical Trust award enabled her to continue her studies at the Royal Northern College of Music where she obtained a Postgraduate diploma in Advanced Performance and was awarded the Rawsthorn Prize for composition.

Maddy currently holds the position of Principal oboe with Sinfonia Viva and Sub-Principal Oboe and Cor Anglais with Bath Philharmonia.

As a freelance player in the UK Maddy has worked with many of the countries leading orchestras including trials with the BBC National Orchestra of Wales (second oboe), Welsh National Opera (second oboe), the Philharmonia Orchestra (Cor Anglais) and the Manchester Camerata (second oboe 1999) and as a guest with orchestras including the Bath Philhamonia (Principal, second oboe and Cor Anglais), BBC National Orchestra of Wales (principal oboe), BBC Philharmonic Orchestra (Second oboe, Cor Anglais), Birmingham Royal Ballet Sinfonia (Principal Oboe), City of Birmingham Symphony Orchestra (Second Oboe),  Halle Orchestra (Second Oboe and Cor Anglais), London Concert Orchestra (Principal and Second Oboe), Opera North (Second Oboe), Orchestra of the Swan (Principal, Second Oboe and Cor Anglais.)

From 2005 to 2013 Maddy was employed by the Anhaltische Philharmonie , Dessau, Germany where she held the position of second oboe with Cor Anglais, leaving the position in order to return to the UK. From 2004 - 2005 she worked for the Suedwestdeutsche Philharmonie, Konstanz, also as Second Oboe / Cor Anglais. In addition, from 2000 - 2005 Maddy was solo oboe at Kammerensemble Cologne where she performed many major oboe concertos including the Mozart Oboe Concerto, Albinioni D minor concerto, Cimerosa Oboe Concerto, Vivaldi D minor and A minor Concertos, Bach Double Concerto, Donizetti Concertino for Cor Anglais and the Telemann Cor Anglais Concerto - a work which Maddy arranged herself and which is now in publication from June Emerson Wind Music. In 2000 Maddy was principal oboe of the D'Oyly Carte Opera Company touring Orchestra.
As a Solo Performer Maddy is also frequently engaged. In 2019 she performed Morriconi's "Gabriel's Oboe" and Copland's "The Quiet City" and in 2018 the Bach Double concerto with Ben Holland and Sinfonia Viva. In 2016 the Mozart Oboe concerto and Klughardt Konzertstück with the Trinity Camerata. In 2011 she performed the Persichetti Parable for solo Oboe as part of the Anhaltisches Theater chamber music series in the Schloss Georgium, Dessau, a series in which she reguarly performs as a soloist and in chamber music. In 2009 she performed the Bach Double Concerto with Myra van Campen-Balint (leader of Anhaltische Philharmonie, Dessau) and Marcello Oboe concerto in D minor in Zahna Church, Germany. She had already performed the Bach with Martin Schulz (co-leader of Anhaltische Philharmonie, Dessau) in Marienkirche, Dessau. In 2003 Maddy was guest with the Chorley Music Society where she performed the Albinoni D minor Oboe Concerto and in 2000 she played the Mozart Oboe quartet and Francaix Cor Anglais Quartet as guest with Missenus Ensemble Bolton. Earlier solo performances included the Vivaldi D minor Oboe Concerto with Bolton Youth Orchestra and in 1993 the Martinu oboe concerto with the Birmingham Conservatoire Sinfonia.

As a composer Maddy has had many pieces performed in the UK and Europe including in 2022 "The Hurlers and the Rumour Catcher" for Soprano, Baritone and chamber ensemble and in 2019 "The Enchanted Forest" for Oboe D'Amore and chamber ensemble at the St. Endellion Summer Music Festival 2015 "Ascendant in Taurus" for Oboe, Cor Anglais, Cello and Harpsichord in the IMPULS festival, Dessau, Germany, in 2014 "River", commissioned by Tres Punkt Reed Quintet  in the "Opening" Festival, Trier, Germany, in November 2012 the Premier of "War Torn and the angel" by the Anhaltische Philharmonie Dessau, a work commissioned by the Impuls festival for new music in Saxon Anhalt and in the same festival, a performance of "On darkness and light and dancers in shadows" in the Georgium Orangerie. In 2011 "3 Sketches for wind quintet" was premiered as part of the Anhaltisches Theater's Chamber music series in the Schloss Georgium, Dessau. In the same concert series in 2009  "On darkness and light and dancers in shadows" - a trio for Oboe, Violin and Cello was premiered. In 2007, Uwe Steadter (solo oboist at the Anhaltische Philharmonie Dessau) premiered "Falling softly, towards you". As part of the Anhaltische theatre's educational outreach programme, Maddy's composition for wind quintet and narrator "The witches cat who lost her spells" is performed reguarly in the theatre and in primary schools in the region. The piece was also be performed in Hannover in May 2012 as part of the NDR Musiktage and in September 2012 in Konstanz by the Suedwestdeutsch Philharmonie. The English language version of the piece is published by June Emerson Wind Music.

Maddy teaches the oboe at Abingdon School and at Headington School, as well as privately. In 2016 she founded the Bicester oboe band with local oboists and students.

Maddy's hobbies include knitting and walking her dog Zigi.