Tertia Sefton-Green CEO and Creative Director 

Dr. Gavin Stewart Senior Manager

Adam S. Eisenberg Business Manager

Abby Swain Projects and Marketing Coordinator

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Tertia Sefton-Green    CEO and Creative Director

tsgtn_161219_0076-hmdtstaff_110pxTertia holds a B.A. Hons. and M.A. Hons. in English from Selwyn College, Cambridge and studied singing at Guildhall School of Music and Drama and Royal Northern College of Music. After leaving Glyndebourne Chorus, her singing career included roles with opera companies in the UK and abroad, a range of concert work and, extensive outreach work. In 1997, she won a Churchill Fellowship to research Opera Education in the United States, and has written teachers’ packs for Royal Opera House, English National Opera, English Touring Opera and San Diego Opera, and worked as Tutor, and Attachments and Residential School Co-ordinator on Rose Bruford College’s Opera Degree Course.

Tertia was Executive Producer for the Covent Garden Festival’s Creation Day 2000, and the following year, she set up and ran the prolific Education Department at the Handel House Museum where work included a young artists’ performance programme, devisary school projects, participatory family events, adult workshops and an after schools’ programme.

Her work as Creative Director for HMDT Music includes the highly acclaimed primary school opera projects I Can Sing! The Hackney Chronicles, The World Was All Before Them, and Shadowball, and the RPS Award winning projects, On London Fields and Confucius Says. Tertia has written the librettos for HMDT Music’s international touring project Hear Our Voice and their First World War project Trench Brothers.  Tertia is also the singing coach for The Saturday Programme’s I Can Sing! music theatre course.


Dr. Gavin Stewart   Senior Manager

Gavin holds both BMus (Hons) and MMus degrees from Royal Holloway, University of London where he focussed his studies on contemporary flute performance, composition, and the intersection of traditional Japanese music and Western Art Music. He is currently working towards completing his PhD, also at Royal Holloway, which retranslates traditional Japanese Shakuhachi techniques onto the Kingma System Flute. His research includes the organisation of a large commissioning project, Retranslated, which comprises works from eight composers across three continents for solo flautist and electronics. These studies have led him to work with Birmingham Contemporary Music Group and the International Contemporary Ensemble on their respective young artist schemes. Gavin has a wide range of experience as an educator and has taught music across a range of learning environments from beginner to advanced flute and piano, through the secondary and further education classroom, and up to undergraduate level. Co-opted in 2020, Gavin is currently the interim chair of the British Flute Society where he leads on organising the direction of the charity and developing live events for members. As HMDT Music’s Senior Manager, Gavin manages The Saturday Programme and supports in the delivery of other HMDT Music projects.


Adam S. Eisenberg    Business Manager

aetn_161219_0095-hmdtstaff_110pxAdam served as Director and General Director of HMDT Music (1999-2022) before having to take a sabbatical due to serious illness. Following a successful liver transplant, he returned to part-time work for the Company as Business Manager in 2024.

A native of New York City, Adam holds a B.A. degree in East Asian Studies and Politics and an M.A. in Social Studies Education and Cultural Studies from New York University. He began his career as an educator, teaching Secondary School students in History and Social Studies. He then moved into the entertainment field in 1989, and worked as a talent agent in Los Angeles, booking a variety of international musical talent, from pop and rock-and-roll to jazz and world beat music.

As Director of Education and Outreach for San Diego Opera (1994 – 98), Adam was responsible for the San Diego Opera Ensemble and Operation:Opera, the largest opera education programme of its kind in the United States.

Prior to his appointment at HMDT Music in 1999, Adam served as a Manager in the Orchestral Touring Department at IMG Artists (London), where he was responsible for the booking of tours for a number of UK and foreign orchestras in Europe, the United States and the Far East.

An avid fan of all forms of music, he has hosted panel discussions and outdoor concerts with featured artists and continues to give presentations on opera and the music business. He was a tutor for the Rose Bruford College distance learning degree in Opera Studies, has appeared on several panels on the subject of music education with OPERA America, served as a grants advisor and reviewer for the National Endowment for the Arts (NEA), and continues to act as an advisor for grant giving organisations in the UK.


Abby Swain   Projects and Marketing Coordinator

Abby holds both a BA (Hons) Music degree and a MA degree in Audiences, Engagement, Participation from the University of Leeds, where her studies focused on the accessibility of musical theatre and the value of the arts in education from the perspective of university students. Alongside working with HMDT Music, she is also a freelance photographer, specialising in photographing theatre, live music, and a range of other events, having worked with organisations such as Leeds Playhouse and Opera North. As HMDT Music’s Projects and Marketing Coordinator, Abby works alongside Tertia Sefton-Green and Gavin Stewart in assisting in the management of projects, maintaining relationships with partners and developing the long-term vision for HMDT Music’s work.




Farquhar Mckay     

Farquhar McKay currently works as the strategic coordinator for 14-19 learning in Lambeth with the responsibility of working with schools, and local college and voluntary sector providers on planning and curricular development. Previously he managed the Adult Learning programmes in Hackney, developing his skills in negotiating contracts within strict public sector financial constraints. He has held a range of responsibilities in education and regeneration management as an English and careers teacher, Education Business Partnership manager and Regeneration officer.


Tony Clark

Tony Clark has over 40 years in the music business having started his career as a sound engineer at Abbey Road Studios and progressing to Senior Engineer and Producer. He has worked alongside artists such as The Beatles, Yehudi Menuhin and Stevie Wonder. He later joined the innovative British Record Industry Trust School for the Performing Arts and taught and projected manage all the technical areas (theatre space, recording studios, video studios and radio studios) as well as supporting the students as Executive Producer in yearly shows and recording projects.


Michele Pullan   Chair

Michele Pullan was a corporate lawyer for over 30 years. After several years in private practice with a City law firm, she worked as an in-house lawyer for a multi-national financial services group. In that role she was involved in a number of large legal matters, was appointed to various Boards and gained extensive management, financial and governance experience. She has always been a supporter of the arts and has been interested in music from an early age. Her daughter shares her interest in music and attended a Young Musicians’ programme, similar to HMDT Music’s Saturday Programme.


Krishna Raman

Krishna Raman is a senior corporate lawyer at Lloyds Banking Group. He advises the bank on its acquisition and disposal programme and, in addition to transactional work, he provides legal advice on a wide range of issues affecting the Bank. Prior to joining Lloyds, Krishna was a corporate lawyer at Allen & Overy, a law firm, for whom he worked in both London and Singapore.


Isabelle Cadignan

A native of Martinique, a French Island in the Caribbean, Isabelle has been living in the United Kingdom for the last 20 years and holds dual French & British citizenship. She is a Chartered Accountant and holds an M.B.A from Lancaster University and an MSc from the Lyons Business School (France).  She is an experienced Insurance professional having held a range of roles within that industry, mostly in the City of London and New York.  She is currently an Executive Director at the Hyperion Insurance Group, a leading international insurance group, where she heads their international network which covers more than 80 territories.


Raphaelle Moysan
Raphaelle Moysan leads the Multi-asset & Macro Investment Specialist team globally at Aviva Investors. Raphaelle began her career at Goldman Sachs in 1998 before moving to Merrill Lynch and JPMorgan where she structured and traded interest-rate derivatives for asset-liability management purposes. Raphaelle graduated from ESCP Europe in Paris (France) with a major in Finance. She also studied at Georgetown University, USA and is a CFA® Charterholder. She is a passionate advocate for the arts.


Lubia Begum-Rob

Lubia Begum-Rob is the Director of the Prisoner’s Advice Service, a national charity, and is a qualified solicitor. She specialises in advising prisoners, focusing on civil litigation and non-litigious complaints regarding ethnic and religious discrimination. Lubia runs a regular legal advice Outreach Clinic at HMP Belmarsh, the highest security prison in Europe. Lubia’s children have been involved with HMDT for almost 15 years and she is a key member of the parental voluntary team.