Treasury Transformation (TMS) - Assistant Manager OR Manager (London)

Forvis Mazars is a leading global professional services network providing audit & assurance, tax, and advisory services. Forvis Mazars in the UK spans 14 offices across the nation and has over 3,400 professionals, with 190 partners. We have a clear purpose and a shared commitment to shape a better future. You will join a collaborative and inclusive team where you are supported to grow your skills, explore new opportunities, and contribute from day one. You will work with a diverse client base, develop meaningful connections, and gain experience that extends beyond your local team. Together, we grow, belong and impact.

In Europe, Forvis Mazars has developed a leading team in Corporate Treasury Advisory with 60+ dedicated consultants supporting Treasury & Financing departments or CFO in four main areas: (i) Treasury Transformation, (ii) Liquidity Optimisation, (iii) Financial Risk Management, and (iv) Operational Support. Forvis Mazars Group has recently launched a strategic initiative to boost the development of this Corporate Treasury Advisory practice with the objective to double its size within three years leveraging on strong existing expertise and Forvis Mazars footprint.

The Opportunity: Forvis Mazars is looking for an Assistant Manager or Manager to join our London team to help lead and deliver client engagements focused on Treasury Management Systems (TMS), bank connectivity and payments (including Bank Communication Tools/payment platforms). This role is ideal for someone with hands-on TMS and/or payments platform implementation experience who enjoys being client-facing, translating requirements into clear deliverables and shaping practical solutions.

Where this role sits: The Assistant Manager/Manager role sits within our UK Treasury Advisory team and typically reports into an Associate Director/Director/Partner.

Key Responsibilities:

• Participate and oversee the delivery of TMS and bank connectivity/payments (BCT) assignments (selection, implementation/PMO, optimisation, configuration, administration support, upgrades, audit, etc.), ensuring client expectations are exceeded and quality standards are met.
• Translate client requirements into clear deliverables and practical recommendations.
• Contribute to UK go-to-market initiatives to develop new opportunities related to TMS and BCT in the UK (marketing campaign, events, publication, direct approach).
• Identify, negotiate and secure business opportunities with the support of existing Treasury Advisory teams and local partners.
• Support team and capability build in the UK and collaborate with Corporate Treasury Advisory colleagues across Europe.

Your Profile:

Essential:

• Minimum of 4 to 5 years' experience in treasury technology/treasury transformation (consulting or in-house), with hands-on exposure to TMS and/or payments platform delivery.
• Certified with one or more TMS platforms, such as Kyriba, ION, FIS, GTreasury (or similar).
• Experience leading workstreams/engagements across requirements, solution design, governance/PMO, testing/UAT and go-live readiness.
• Strong stakeholder management and workshop facilitation skills; comfortable with Treasury/Finance/IT audiences.
• Ability to turn ambiguity into structured decisions, plans and deliverables.
• Fluent English (written and spoken).

Desirable:

• Hands-on experience leading bank connectivity and payment factory workstreams: SWIFT/host-to-host/APIs, payment factory concepts, bank onboarding.
• Familiarity with treasury operating model/process redesign alongside systems.
• Knowledge of the UK treasury ecosystem (ACT, banks, vendors).
• People leadership (coaching/informal line management).

What We Offer:

• A chance to help build a growing UK treasury technology capability, backed by a strong and established European treasury advisory team.
• High-impact client work across treasury transformation, technology and payments.
• Significant autonomy and responsibility with clear progression opportunities.
• Hybrid working and flexible arrangements.
• Training and development programs in a collaborative international environment.

Diversity, Equity & Inclusion:

At Forvis Mazars, diversity, equity and inclusion are central to our values. We value our people's unique backgrounds, perspectives, and experience, and know this diversity creates better outcomes for our clients. We seek to attract, develop, and retain the best talent, inclusive of sex, ethnicity, disability, socio-economic background, sexual orientation, gender identity, nationality, and faith. We select candidates based on skills, knowledge, qualifications, and experience and aim to support all our team members to reach their potential. At Forvis Mazars, we promote an environment in which you can grow your skills, belong to a team that values your ideas, and make an impact that matters.