Forensics & Investigations - Assistant Manager

Forvis Mazars LLP; Greater London; On-site; GBP 60,000 - 85,000; Full time

Job summary

Forvis Mazars in the UK is seeking an Assistant Manager to deliver high-quality forensic and valuation assignments, manage defined workstreams, and support business development for the London practice and national team.

You will work on disputes, investigations, and compliance matters, supervise junior staff, and collaborate with Partners to meet client expectations within budget and timelines. This role offers varied, challenging engagements.

Qualifications

• Qualified accountant (ACA/ACCA/ICAS).
• Previous forensic or valuation experience is beneficial but not essential.
• Strong analytical ability and a methodical approach to reviewing financial and non-financial information.
• Effective time management with the ability to deliver high-quality work.

Responsibilities

• Perform detailed forensic accounting work, including targeted financial analysis, transaction testing, and data interrogation.
• Undertake in-depth document review to identify key issues, anomalies, and patterns.
• Assist in reconstructing financial records and preparing evidence files suitable for litigation or regulatory scrutiny.
• Produce clear, well-structured working papers that support findings and conclusions.
• Support Managers, Directors, and Partners in preparing expert reports for litigation, arbitration, and ADR.
• Contribute to the quantification of damages, valuation assessments, and financial modelling for dispute matters.
• Help prepare high-quality written reports, schedules, and exhibits for use in legal proceedings.
• Manage workstreams, ensuring tasks are completed accurately, on time, and to a high standard.
• Coach and support junior team members, providing guidance and constructive feedback.
• Proactively contribute to the efficient operation of each project, escalating issues as needed.
• Participate in non-chargeable activities, including proposals and business development.

Skills

ACA/ACCA/ICAS

Forensic analysis

Data analytics

Attention to detail

Time management

Communication

Team collaboration

Problem solving

Education

ACA/ACCA/ICAS

Tools

MS Office

Job description

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'll join a collaborative and inclusive team where you're supported to grow your skills, explore new opportunities, and contribute from day one. You'll work with a diverse client base, develop meaningful connections, and gain experience that extends beyond your local team. Together, we grow, belong and impact.

About the team

Our Forensics and Investigations Services team is a dynamic, close‑knit group of more than 35 professionals based across three offices in the UK and one in India. We combine intellectual challenge with real‑world impact, working on high‑profile, complex matters across two core areas: Disputes and Investigations & Compliance.

Disputes

We act as financial and accounting experts—either as Independent Expert Witnesses or Expert Advisors—in a wide range of contentious matters. These typically arise in litigation or arbitration and include:

• Post‑M&A disputes
• Investment arbitration
• Financial reporting disputes
• Breach of contract claims
• Professional negligence cases

Investigations & Compliance

We conduct financial and non‑financial investigations for corporates, regulators, and public bodies, including:

• Fraud and corruption investigations
• Regulatory and government inquiries
• Compliance reviews and advisory engagements

We help organisations strengthen internal controls, respond to allegations of misconduct, and navigate complex regulatory environments.

A Diverse and Stimulating Workload

Our engagements span a wide range of sectors and clients. Whether supporting a multinational energy company in a multi‑billion‑dollar arbitration, assisting a local authority with procurement concerns, or investigating potential financial reporting fraud for a national regulator, you will gain exposure to varied and intellectually stimulating work.

A Collaborative and Supportive Culture

This is demanding work that requires strong attention to detail, excellent problem‑solving skills, and a commitment to high standards. But you will never be working in isolation. Our culture is collaborative and supportive—from Partners to graduates, everyone is approachable, knowledgeable, and invested in your development. You will be part of a team that values curiosity, integrity, and continuous learning.

About the role

As an Assistant Manager, you will play a key role in delivering high‑quality forensic and valuation assignments, ensuring client expectations are met within agreed budgets and timelines. You will work independently on defined workstreams, support senior colleagues on complex engagements, and contribute to the development of junior team members. You will also be involved in business development activities that support the continued growth of the London practice and the wider national team.

Investigations & Forensic Analysis

Perform detailed forensic accounting work, including targeted financial analysis, transaction testing, and data interrogation.

Undertake in‑depth document review to identify key issues, anomalies, and patterns.

Assist in reconstructing financial records and preparing evidence files suitable for litigation or regulatory scrutiny.

Produce clear, well‑structured working papers that support findings and conclusions.

Disputes & Expert Support

Support Managers, Directors, and Partners in preparing expert reports for litigation, arbitration, and ADR.

Contribute to the quantification of damages, valuation assessments, and financial modelling for dispute matters.

Help prepare high‑quality written reports, schedules, and exhibits for use in legal proceedings.

Project Delivery & Team Contribution

Manage workstreams, ensuring tasks are completed accurately, on time, and to a high standard.

Coach and support junior team members, providing guidance and constructive feedback.

Proactively contribute to the efficient operation of each project, escalating issues and supporting senior team members as needed.

Participate in non‑chargeable activities, including preparing proposals, supporting business development initiatives, and contributing to internal projects.

Attend in‑house training and maintain awareness of the full range of services offered by Forvis Mazars.

What we are looking for

Qualifications & Experience

Qualified accountant (ACA/ACCA/ICAS).

Previous forensic or valuation experience is beneficial but not essential.

Skills & Attributes

• Strong analytical ability and a methodical approach to reviewing financial and non‑financial information.
• Inquisitive mindset, sound judgement, and the ability to think creatively when solving problems.
• High level of attention to detail and commitment to producing high‑quality work.
• Effective time management skills, with the ability to prioritise and manage multiple tasks.
• Proactive approach, taking ownership of assigned work and contributing to team success.
• Strong written and verbal communication skills, with the ability to build credible relationships.
• Alignment with our values, particularly respect, integrity, and appreciation for diversity.
• Commitment to continuous learning and professional development.
• Proficiency in standard IT tools and comfort working with data.

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 create 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’t’growyour skills,’belongto a team that values your ideas, and make an’impactthat matters.

Forvis Mazars is a leading global professional services network providing audit & assurance, tax and advisory services.

In the UK, we're home to more than 3,400 professionals and 190 partners across 14 offices, all united by a shared purpose: shaping a better future.

Whether you're starting your career or taking your next step, you'll find opportunities to learn, develop and make a meaningful contribution from day one.

We believe the best ideas come from different perspectives, so you'll be encouraged to bring your whole self to work, collaborate with talented people across our firm, and build relationships that help you grow.

At Forvis Mazars, you'll belong to a local team, benefit from global opportunities, and make an impact for our clients, communities and each other.

Together, we grow, belong and impact.

Our feedback and coaching culture means we are passionate about improving our application process. At Forvis Mazars, we believe great careers start with great experiences. That's why we're committed to providing a transparent, respectful and people‑centred recruitment process. Every application is reviewed by our team, and all candidates will receive an outcome, regardless of the result.