Who We Are

Harry has over 40 years’ experience in all areas of the art world, having acquired Gurr Johns in the mid 1980’s after a career at Christie’s and as an independent advisor. A specialist in Impressionist and Modern Art, Harry advises collectors on the sale and purchase of works of art and has coordinated a number of major valuations, including the Sara Lee Millennium Gift, and the valuation for The United Nations of the losses sustained as a consequence of the Iraqi invasion of Kuwait. He is a leading expert witness in art market litigation, and is certified in the Uniform Standards of Professional Appraisal Practice (USPAP).

Elizabeth Amundsen

Vice President, Business Development

Chicago & The Midwest

eamundsen@gurrjohns.com

Based in Chicago, Lizzie leads business development for the Midwest. She works closely with attorneys, private banks, wealth managers, insurance professionals, and private clients on the valuation of fine and decorative art, jewelry, watches, and all other tangible personal property for the purposes of estate planning, estate tax, family division, estate litigation, charitable giving, insurance, and using art as collateral. She also facilitates private sales for art collectors and fiduciaries.

Prior to joining Gurr Johns, Lizzie served as Chief Marketing Officer and Vice President of Sales for an architectural facade company where she specialized in cultural institutions and landmark buildings including the Steppenwolf Theater and Willis Tower. Previously, she co-founded a digital media company to empower art museums and other cultural institutions to expand their digital footprint. She has further experience in art advisory and curatorial roles.

Lizzie is a member of the Arts Club of Chicago and the Society for Contemporary Art. She serves on the associate board of Urban Gateways, which works to overcome social and economic barriers for youth to access Chicago’s artistic vitality. Lizzie holds a BFA in Art History, Theory, and Criticism from the School of the Art Institute of Chicago.

Jessica Wessel, Esq.

Senior Vice President, Business Development

New York

jwessel@gurrjohns.com

Jessica Wessel is a Senior Vice President of business development at Gurr Johns, Inc., where she assists private collectors and institutions with the valuation and disposition of art and other assets. In this role, Jessica works closely with insurance brokers and carriers, as well as private banks and family offices, to provide clients with comprehensive appraisal and collection management services.

Prior to joining Gurr Johns in 2014, Jessica practiced corporate law at Herrick, Feinstein LLP, where she also advised clients on a range of transactional art law matters, including advice with respect to art funds and art loans. Jessica received her JD from Villanova University School of Law and her BBA from the Stephen M. Ross School of Business at the University of Michigan. She is admitted to the practice of law in New York.

Nivedita Poddar

Delhi

india@gurrjohns.com

Nivedita completed her Masters in Modern and Contemporary Art at Christie’s Education, London. She has previously worked at Christie’s London, Experimenter Gallery, Kolkata and Frieze London.

Surath Singh

Business Head

India

india@gurrjohns.com

Surath joined Gurr Johns in 2016 bringing with him over 15 years of experience working with art, luxury and lifestyle brands in India. Prior to joining Gurr Johns, Surath had worked with Religare Art for 6 years as Head of Business Development in India. He was instrumental in setting up the Art Advisory business for his previous organisation and has been advising art collectors in building up their portfolio of Modern and Contemporary Indian Art. Besides art, Surath has spent considerable time of his career developing businesses for some of the leading European Luxury brands in India.

Sarah Dalrymple

Advisor Associate

New York

usadvisory@gurrjohns.com

Prior to joining the Gurr Johns team, Sarah worked for both galleries and auction houses in the tristate area. Most recently she managed all incoming valuation inquiries for an online art auction platform. There she gained experience cataloguing and researching works of art for auction while also co-managing their client services team. Sarah obtained her MA in History of Art and the Art Market from Christie’s Education, New York, and her BA in Art History from Drew University.

Lauren Kantor

Executive Vice President, Business Development (West Coast)

Los Angeles

lkantor@gurrjohns.com

Based in Los Angeles, Lauren leads business development on the West Coast. She facilitates the appraisal of fine art, decorative art, jewelry, watches and other tangible personal property for the purpose of estate planning, estate tax, divorce, estate litigation, charitable giving, insurance and using art as collateral. Lauren also works with fiduciaries and private clients to strategically offer single works or an entire collection in the market.

Prior to joining Gurr Johns, Lauren had over 15 years’ experience in the international auction business working in London, Toronto, New York and Los Angeles. After completing her MA in Art Business at Sotheby’s Institute in London, Lauren went on to work with Christie’s, Bonhams and most recently at Sotheby’s as Head of Valuations in New York.

Darsi Monaco, Esq.

Director, Trusts & Estates

New York

dmonaco@gurrjohns.com

As the Director of Trusts and Estates, Darsi assists fiduciaries and private clients with the valuation and disposition of art and tangible personal property for estate planning, estate tax, divorce, estate litigation, charitable giving and using art as collateral. Darsi advises on IRS and USPAP rules, and best practices for valuations in complex art–related transactions and litigation.

Prior to joining Gurr Johns, Darsi worked in elder law, where she focused on the unique estate planning needs of artists, and developed a manual on estate planning for elder artists in New York. Before pursuing a law degree, she worked in art and film as a producer and production designer for films premiering at international film festivals and for art gallery installation.

Darsi obtained her BA from Bard College, and JD from the City University of New York School of Law, and is admitted to practice in New York. She is a member of the Bard Center for Curatorial Studies Arts Council, the Planned Giving Advisory Council for the New York Historical Society, and the Estate and Gift Taxation Committee of the New York City Bar Association.

Sara Thomeier

Executive Vice President and Jewelry Specialist

New York

Sara comes to Gurr Johns, Inc. with over 15 years of hands on experience in all areas of the jewelry business. Her experience includes extensive work in the auction world and with a vast network of international dealers and collectors, as well as comprehensive knowledge of jewelry manufacturing. Sara is qualified in valuing diamonds, pearls and colored gem stones and has a solid background of trading in these and estate jewelry. Having taken advanced training courses in gemology and offered valuation services to her clients throughout her years as a dealer, Sara is delighted to bring those qualifications to Gurr Johns and its valued collectors.

Nicole Smith

Appraiser

New York

Nicole first came to Gurr Johns in 2012 as a Research Associate, assisting with the valuation of Fair Market and Retail Replacement appraisals. Nicole re-joined the Gurr Johns team in March 2017 as a Junior Appraiser after working as a cataloguer in the 20^th Century & Contemporary department at Phillips, New York and as a Research Assistant for the Isamu Noguchi Catalogue Raisonne at The Isamu Noguchi Foundation and Garden Museum, New York. In 2019 she was promoted to full Appraiser. Nicole comes with 10 years of experience working in the arts, with a particular fondness for historic homes and unique and off-beat collections. As an Appraiser, she evaluates general contents with a focus in fine arts. Nicole earned her Bachelor’s Degree in History from the University of Scranton and her Master’s Degree in Modern and Contemporary Art from Christie’s Education. Nicole Smith’s appraisals are compliant with the Uniform Standards of Professional Appraisal Practice (USPAP).

Patrick Sheehan

Vice President, Appraiser of Furniture and Decorative Arts, 19^th – 20^th Century Design, General Contents

New York

Patrick joined Gurr Johns in 2011 from the 20th Century Design Department of Sotheby’s, having previously specialized in European Furniture at Christie’s. He has a BA in Art History from the University of Florida, and an MA in Decorative Art and Design History from the Bard Graduate Center in New York City. While studying for his MA he attended a summer study program offered in conjunction with the Royal College of Art, The Victoria & Albert Museum, The Wallace Collection and Waddesdon Manor. Patrick has over 20 years’ experience as an appraiser and has a particular interest in the problematic areas of Tiffany glass, bronze and ivory sculptures, and art deco furniture. Patrick Sheehan’s appraisals are compliant with the Uniform Standards of Professional Appraisal Practice (USPAP).

Kristina Ryan

Generalist Appraiser

New York

eastcoastappraisals@gurrjohns.com

Before joining Gurr Johns in 2017, Kristina was a Decorative Arts Generalist in the Estates, Appraisals, and Valuations Department at Christie’s. Prior to her tenure at Christie’s, Kristina was a Cataloguer and Appraiser at Roland Auctions in New York. After graduating from the Parsons/Cooper-Hewitt Master’s Program in the History of Decorative Arts and Design, Kristina operated her own Art Appraisal and Consulting business in Nashville, Tennessee where she was a consultant to several regional auction houses in the Southeast. Kristina’s appraisals are compliant with the Uniform Standards of Professional Appraisal Practice (USPAP).

Tim Luke

Executive Vice President, Senior Appraiser

New York

Tim joined Gurr Johns in 2018 and specializes in Fine & Decorative Arts, with a special concentration on Street & Urban Art. He has 28 years of experience in the auction and appraisal industry, beginning his career at Christie’s in New York where he became a Director and Auctioneer. After leaving Christie’s, Tim established and was president of his own auction/appraisal/events business, TreasureQuest Group, Inc., for twenty years located in South Florida providing appraisals for divorce, insurance, donations, and estates, along with providing auction and brokerage services of Fine & Decorative arts. Tim works with non-profits and serves as benefit auctioneer for many high profile charities across the United States. He is an active member of the National Auctioneers Association (NAA) and is an Accredited Member of the International Society of Appraisers. He is an instructor and serves on the Graduate Personal Property Appraiser committee for the NAA and was awarded the Pat Massert Leadership Award from the Certified Auctioneer Institute. Tim Luke’s appraisals are compliant with the Uniform Standards of Professional Appraisal Practice (USPAP) and he is also an AQB Certified USPAP Instructor.

Timothy Hamilton

Generalist Appraiser

New York

eastcoastappraisals@gurrjohns.com

Tim joined Gurr Johns in 2010 and specializes in the Fine and Decorative Arts. He has 25 years’ experience gained with Sotheby’s New York, where he previously worked in General Furniture and Decorative Arts auctions, in Single-Owner Sales, and as an Appraiser in the Trusts, Estates and Appraisals Department. He has a BA from Williams College and is a graduate of the Sotheby’s Institute American Arts Course in New York. Timothy Hamilton’s appraisals are compliant with the Uniform Standards of Professional Appraisal Practice (USPAP).

David Vyvyan-Robinson

Senior Picture Specialist and Valuer

London

David has over three decades of experience in the fine art trade. A past member of the Society of London Art Dealers, he has sold important works of art to a number of British and European Museums, as well as corporate collections and private individuals.

Russell Varney

Senior General Valuer

London

Russell originally joined Gurr Johns in 1990, working with us for a decade before moving back to Bonhams Auctioneers, London, where he first began his career in 1984, first in the Ceramics and Works of Arts Department and then as a General Valuer in the Valuations Department. He returned to Gurr Johns in 2008, having been Director and Head Valuer at Seymours, London and previously Head Valuer at Lark Asset Consultants in Essex. Russell has been a Fellow of the National Association of Valuers and Auctioneers (FNAVA) since 2005, before which he became an Associate (ANAVA) in 1995. He has been a Fellow of the Royal Institution of Chartered Surveyors (FRICS) since 1996, and was an Associate (ARIS) from 1986. He has almost 30 years’ experience in the valuations business.

Siobhan Tyrrell

Senior Valuer & Jewellery Specialist

London

Siobhan has 20 years’ experience in the auction world, and is a qualified diamond, pearl and coloured stone grader and, since 2003, a Fellow of the Gemmological Association. Before joining Gurr Johns in 2004, Siobhan was a valuer at Bonhams New Bond Street, London and previously, Assistant Manager at Ambrose Auctioneers, Essex. She was the UK’s top-scoring student on her Southampton Fine Art & Chattels course, and quickly went on to achieve membership of the Royal Institute of Chartered Surveyors. Her valuation skills have featured on television, and are sought after by an extensive global network of clients.

Mark Peters

Senior General Valuer

London

Mark joined Gurr Johns in 1990 having previously worked as a General Valuer at Sotheby’s London for almost a decade. Prior to that, Mark was with the Antiques Department at Bonhams, London, after working as a trainee at Christie’s, London. He has been a Fellow of the Royal Institution of Chartered Surveyors (FRICS) since 1996, and before it merged with RICS, an Associate of the Incorporated Society of Valuers and Auctioneers (ASVA) from 1985. He has over 30 years’ experience and specialist knowledge of jewellery, silver, furniture and porcelain.

Anthony McNerney

Director, Contemporary Art

London

Tony joined Gurr Johns in 2013 bringing over 20 years of expertise in the contemporary art world. He started his career at Christie’s where he rose through the ranks to become Director and Head of the Post-War and Contemporary Art departments. He subsequently held senior roles in both the auction and gallery sectors, including Director of Contemporary Art at both Phillips de Pury and Bonham’s, Director of Haunch of Venison gallery and Managing Director of Ben Brown Fine Arts.

Charlie Maxwell

Director, Valuations

London

Charlie Maxwell joined Gurr Johns in August 2020 as Director Valuations, and is responsible for leading Gurr Johns European valuations department with a focus on service delivery and client relations. The Gurr Johns valuation team employs the collective expertise of 160 Specialists from around the world.

Most recently, Charlie lead the UHNW and Fine Art underwriting team at AXA ART, before which he worked for a high-profile international family office. After university, Charlie honed his organisational and management skills as an officer in the British Army for eight years.

Claire-Louise John

Client Relations Manager, Valuations Department

London

Claire-Louise joined Gurr Johns at the start of 2010. Her ongoing focus is client liaison and business development within the Valuations Department, and in 2014 she was also responsible for Gurr John’s centenary rebrand. An experienced communications specialist, Claire-Louise began her career in business and financial public relations in New York. She has also worked in editorial and publishing. She has a background in arts administration and events, most notably with the Covent Garden Festival of Opera and Music Theatre, an interest now expressed in her role as a Trustee of FitzFest classical music and cultural festival in Fitzrovia. She is an Honours graduate of Aberdeen University and has a Masters degree from the University of London.

Sonia Fazlali-Zadeh

Jewellery Specialist & Valuer

London

Sonia joined Gurr Johns in 2018. She has more than a decade of experience in the jewellery industry having started her career as a jewellery designer before moving on to work in retail and latterly focusing on valuations of fine and rare jewels. During this time, she has developed an extensive network of dealers, collectors, specialists and master craftsmen. She is a member of the Institute of Registered Valuers, a fellow of the Gemmological Association and is fully qualified as a gemmologist, diamond and pearl grader, having achieved distinction in her FGA and graduate diamond course with the Gem-A and GIA respectively.

Simon Cooper

Senior General Valuer

London

Simon joined Gurr Johns in early 2014 having previously worked for 13 years at Rosebery’s Auctioneers & Valuers, where he was a Director from 2007. He began his career as an auctioneer and valuer for one of Scotland’s leading provincial auction houses, Thomson Roddick & Laurie, and has worked as an antiques expert for an online antiques website, and as a consultant in various roles including for George Bailey of Sotheby’s at The Auction Room. In 1994 he completed both the Fine Art & Chattels course at Southampton and The National Association of Goldsmiths’ Professional Jewellers’ Diploma, and in 1996 joined the ISVA now incorporated into the RICS. Simon has a broad range of knowledge, and over 20 years’ experience in the fine art world.

William Boize

Senior General Valuer

London

With over 30 years’ experience as a valuer, William joined Gurr Johns in 2000. He was previously a Senior Valuer and Associate Director at Phillips International Fine Art Auctioneers both in the Midlands and the South West, after training with Andrew Grant valuers and auctioneers in Worcester. He has also worked in a family firm of antique dealers where he gained a valuable insight into the retail trade.

Ben Clark

Deputy CEO

London

Ben Clark is Deputy Chief Executive Officer, Gurr Johns International. Ben brings 20 years’ global art market experience of building and managing art collections across multiple disciplines and regions and is a trusted partner and close advisor to a number of international entrepreneurs and families.

He previously served as a market leader in the field of art advisory during a tenure of twenty years at Christie’s, based in London and Hong Kong, where he rose to the post of Global Head of Client Strategy and Deputy-Chairman of Asia, and was charged with expanding the firm’s overall business development across Asia. Ben began his career at The Art Institute of Chicago before joining Christie’s in 2000.

Highlights of Ben’s career include securing and selling the Collection of legendary collector Jan Krugier for over US$100million in 2014, and more recently Gaugin’s sculpture Theresefor USD 31 million. Ben has produced and co-curated a series of exhibitions celebrating the collector, including the loan exhibition ‘Generation Y Collectors’ at the Museum of Mankind, London in 2010, and the first public exhibition of Van Gogh pictures in Hong Kong in 2019.

Stephen Meadowcroft

Director, Valuation Services

London

Stephen has been with Gurr Johns since 2001 when he joined as our Northern Representative and General Valuer. He became Director of Valuations in 2007 and a Board Director in 2011. He had previously worked as an independent valuer for over 15 years, before which he was with Sotheby’s in Chester where he was Director of the Furniture Department and Manager of the Valuation Department for the North of England. He started his career as a General Valuer at Lawrences of Crewkerne, and has over 40 years’ experience in the business.

Diane Abela

Director, Middle East

London

Diane is Gurr Johns’ Director for the Middle East. She works with both private and institutional clients in the region advising on acquisitions and sales, valuations and collection management. Among recent projects, Diane devised and implemented an Arts Management course in partnership with the Ecole Superieure des Affaires (ESA Business School) in Beirut and London, and co-organised an international exhibition in conjunction with Ai WeiWei in Baalbek, Lebanon – a UNESCO protected site.

Diane joined the company in 2012. She is an ambassador of the World Land Trust and a board member of the Association for the Promotion and Exhibition of the Arts in Lebanon (APEAL). She has an MSc in Insurance and Risk Management, is a Chartered Insurer (CI), and has an Art Business diploma.

Mark Adams

Senior Art Advisor

London

Mark Adams joined Gurr Johns in February 2020 and has been a trusted partner for museums and private art collectors for over thirty years.

Mark’s expertise lies in European Impressionism and 20^th Century art, and particularly in American art. He holds an MA in History of Art from Corpus Christi College, Cambridge and joined Sotheby’s in 1989 as a specialist in 20^th century British Art, where he built a reputation as an innovator, founding the Irish sale. In 2000 Mark joined Agnew’s as director of contemporary art, since when he has worked as an independent advisor for the almost two decades, serving institutions, family offices and private collectors in Europe and the US.

Spencer Ewen

Art Advisor

London

Spencer grew up surrounded by art with an American artist father. Having studied Art History at the University of East Anglia and spent time as a post-graduate at an auction house, he went on to teach and gain trade experience at three separate art dealerships. From 1992 to 1999 Spencer worked for Gurr Johns. From 2000 onwards Spencer established Seymours Art Advisers which from 2019 is incorporated within Gurr Johns.

Georgina Macpherson

Private Clients and Business Development

London