c5-alliance, now operating as BDO C5 Alliance after its acquisition by BDO in the Channel Islands in 2018, is a prominent technology solutions provider. With offices in Jersey and Guernsey, the company specializes in delivering a comprehensive suite of IT services including strategic consultancy, cloud solutions, managed services, data analytics, and business intelligence. BDO C5 Alliance empowers businesses across various sectors to harness technology for improved efficiency, innovation, and the achievement of their strategic objectives, playing a key role in their digital transformation journeys.
Serves as a key operational hub for BDO C5 Alliance in Jersey, delivering technology solutions, expert consultancy, and managed IT services to a diverse client base in the Channel Islands and internationally.
Modern office facilities integrated within the BDO Jersey corporate environment, designed to foster collaboration, innovation, and efficient service delivery.
A dynamic, client-focused, and collaborative work culture that blends the agility and deep tech expertise of C5 Alliance with the established professionalism and global network of BDO. Emphasis is placed on continuous learning and innovation.
The Jersey headquarters is strategically important, leveraging the island's status as a leading international finance centre to serve a wide range of industries. It acts as a center of excellence for technology services within BDO Channel Islands.
BDO C5 Alliance primarily operates from its offices in Jersey and Guernsey. However, as an integral part of the BDO global network, which spans over 160 countries and territories, it can support clients with international operations. This global affiliation allows BDO C5 Alliance to leverage worldwide expertise, resources, and collaborative project capabilities, extending its service reach far beyond the Channel Islands.
First Floor, Windward House, La Route de la Liberation
St Helier
Jersey
Channel Islands
Address: PO Box 194, Bordage House, Le Bordage, St Peter Port, Guernsey, GY1 4BY
To deliver localized technology expertise and support to clients in Guernsey, complementing the Jersey operations and ensuring comprehensive Channel Islands coverage for BDO C5 Alliance services.
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As of April 2025, C5 Alliance' leadership includes:
C5 Alliance has been backed by several prominent investors over the years, including:
No high-level executive (Director level and above within the core BDO C5 Alliance leadership team) hires or exits have been prominently reported in public sources in the last 12 months. The leadership team, largely integrated from C5 Alliance, appears stable within BDO Channel Islands.
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Following its integration into BDO, email addresses for personnel at BDO C5 Alliance typically follow the standard BDO corporate email format. This usually consists of the first name and last name separated by a dot, followed by '@bdo.je' for Jersey-based staff or '@bdo.gg' for Guernsey-based staff.
firstname.lastname@bdo.je or firstname.lastname@bdo.gg
Format
jane.doe@bdo.je
Example
85%
Success rate
BDO Jersey • 15 September 2023
BDO Jersey announced the appointment of Davinia Bishop as a Senior Manager in its technology advisory team, which forms part of BDO C5. This strategic hire is aimed at enhancing the firm's capabilities in providing expert technology advice and innovative solutions to its diverse clientele....more
BDO Jersey • 05 July 2023
BDO Jersey celebrated a significant round of 23 promotions across its various service lines, notably including advancements within its Technology (C5 Alliance) division. These promotions underscore the firm's continued growth and its commitment to fostering internal talent....more
BDO Jersey (and various news outlets) • 26 July 2018
BDO in Jersey officially acquired C5 Alliance Group Limited, a leading technology solutions provider in the Channel Islands. This landmark acquisition significantly bolstered BDO's technology advisory and service capabilities, integrating C5's expertise into the BDO network to form BDO C5 Alliance....more
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