About a-team Marketing Services
The knowledge platform for the financial technology industry
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Jonathan Clark to Leave Citisoft and Join Pentagon Consulting

Subscribe to our newsletter

Jonathan Clark will leave Citisoft, the buy-side consultancy he cofounded 30 years ago and sold to Tech Mahindra in 2005, at the end of this month and take up the role of CEO at Pentagon Consulting Group, also a buy-side specialist, at the start of next month.

At Citisoft, Clark and his colleagues grew the company into a trans-Atlantic advisory and delivery consulting firm. When the company was acquired by Tech Mahindra, Clark combined the advisory and project leadership strengths of Citisoft with the offshore technology and business processing services of Tech Mahindra to offer the market an end-to-end service from strategy to day-to-day operations. He also set Tech Mahindra strategy to develop platforms that deliver specific managed services.

Among the platforms and services developed during Clark’s time at Tech Mahindra are a market data utility providing global security and price information, a pensions administration service, and a trade execution expense management service. Despite his impending departure from Citisoft, Clark says Tech Mahindra has asked him to continue to work with the company as a client of Pentagon.

At Pentagon, Clark will work alongside Matthew Peacock, the company’s cofounder and CEO, who will move to the position of executive chairman when Clark joins. Pentagon has over 10 years’ experience of implementing SimCorp and Markit EDM solutions and plans to develop relationships with additional software vendors and move up the value chain to add more advisory services to its implementation skills. With about 36 employees based mainly in London with a few in North America, Pentagon also plans to grow its employee base as it builds business in the UK, Europe and North America.

Clark says that after so long at Citisoft it is time for him to make a change and that he is looking forward to being back on the development side of the business and taking Pentagon into its next stage of growth. Clark will be based in London and becomes a shareholder in Pentagon along with Peacock.

Subscribe to our newsletter

Related content

WEBINAR

Upcoming Webinar: The ROI of Data Trust: Quantifying the Business Value of Data Observability

Date: 8 July 2026 Time: 10:00am ET / 3:00pm London / 4:00pm CET Duration: 50 minutes Data is the fuel that keeps modern financial institutions’ motors running but if that data can’t be trusted then the decisions made based upon it, or the uses to which its put, will be compromised. That’s especially important for...

BLOG

CGS Focuses on Hard-Won Privates Expertise Amid Buzz of Startups

CUSIP Global Services is leveraging its history of servicing syndicated loans, asset-backed securities, options, derivatives and other complex asset classes as it expands into the growing private credit and alternatives space. The Norwalk, Connecticut-headquartered provider of issuer and asset identifiers is working closely with financial digital platform FactSet, the Loan Syndication and Trading Association (LSTA)...

EVENT

AI in Capital Markets Summit London

Now in its 3rd year, the AI in Capital Markets Summit returns with a focus on the practicalities of onboarding AI enterprise wide for business value creation. Whilst AI offers huge potential to revolutionise capital markets operations many are struggling to move beyond pilot phase to generate substantial value from AI.

GUIDE

AI in Capital Markets Handbook 2026

AI adoption in capital markets has moved into a more disciplined phase. The priority is now controlled deployment: where AI can be used safely, where it can deliver measurable value, and how outputs can be governed, monitored and evidenced. The 2026 edition of the AI in Capital Markets Handbook examines how AI is being applied...