Nadine Shousha

BSc (Hons), GDL, Cert CII

Account Manager

Nadine has a degree in Biochemistry and Law as well as speaking fluent French and Arabic.

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Darren Margolis

LLB (Hons)

Head of Protection Insurance

Darren has been a Protection Specialist for nearly 12 years. He began his career as a solicitor, where he worked in Private Practise focusing on Compliance and Litigation.

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Will Guess

BA (Hons)

Partner

Will is an entrepreneur at heart and has a wealth of business and insurance expertise.

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Emma Smith

Account Director

Emma has over 18 years of experience in the industry from broking at the world largest insurance broker to placing policies into Lloyds. She is amazingly personable and brings an amazing atmosphere and knowledge base to our team.

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Jordan Marks

BA (Hons), Dip CII

Broking Director

Jordan is the Broking Director at Sioma. Prior to joining, Jordan was a Senior Underwriter at Arch Insurance with six years of experience. At Arch, Jordan was the number one New Business Underwriter across the entire UK.

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Alexander Margolin

Chartered Insurance Broker BSc (Hons), ACII 

Managing Director

Alexander is the founder of Sioma and a Chartered Insurance Broker.

As the principal consultant at Sioma, Alexander is always looking to best advise and support UK businesses and individuals, utilising his knowledge and expertise gained with a decade of experience in the insurance industry.

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Boutique Insurance Advisory

Lets Talk

We offer a fresh and vibrant approach to insurance, recognising that every business and individual faces their own set of unique risks and challenges.

Explore Insurance

With Sioma, you’re not just a client – you’re a valued partner

Backed by a strong technical insurance background; our business leaders bring invaluable knowledge honed through years of experience in underwriting to handle the complexities of commercial insurance with unparalleled precision and the intricacies of advising ultra high net worth individuals.

At Sioma, we prioritise quality over quantity, allowing us to offer an unrivalled level of customer service. By focusing on a select number of complex and high-value clients, we ensure that each interaction reflects our dedication to excellence.

£2bn+

Value of real estate insured in the UK

50+

Different industries serviced

£15m

Highest value body part insured

£2.3m

Highest value individual vehicle insured

£1.6m

Highest value individual antique insured

£105m

Largest construction site insured

OUR STORY

Sioma’s founder, Alexander Margolin, has over a decade of experience in the industry, having spent 6 years at the largest insurance company in the world, Allianz, prior to founding Sioma in 2018.

During his time at Allianz, underwriting mid-corporate property and casualty risks in the City of London, Alexander completed his insurance professional exams to become a Chartered Insurance Broker. He was recognized by the industry and awarded Young Underwriter of the Year at the Insurance Post Underwriting Services Awards in 2015.

Most recently, Alexander was named one of the top 24 talents under the age of 35 in the UK insurance industry by Insurance Business UK and won the coveted Broker of the Year (under 35) award from the industry trade body – the British Insurance Broking Association.

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We’re a dynamic team of young brilliant minds, fueled by a passion for excellence and a commitment to redefine industry standard.