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Ernst & Young

Global professional services: consulting, assurance, tax

Commercial Due Diligence Manager

Full-TimeUpdated on 10/15/2026
No salary listed
Senior
Bachelor's, Master's
Lisbon, Portugal
Hybrid
ConsultingFinancial & Transaction Advisory

About the job

Requirements
  • A Bachelor's or Master's degree in Business, Economics, Finance, Engineering, Management, or a related field.
  • Five to eight years of professional experience, ideally including Commercial Due Diligence, Strategy Consulting, Transaction Advisory, Market Intelligence, or related fields.
  • Project management skills, including managing workstreams, coordinating teams, interacting with senior stakeholders, and delivering high-quality outputs under tight timelines.
  • Experience conducting market assessments, competitive analyses, growth opportunity evaluations, customer research, or broader strategic analyses.
  • A strong commercial mindset and ability to identify new business opportunities and contribute to client development activities.
  • Full professional proficiency in Portuguese and English.
  • Availability to work in Portugal and collaborate with international teams across multiple geographies.
  • Ability to independently lead complex projects and manage senior-level client and stakeholder relationships.
  • Strong analytical and problem-solving capabilities, with the ability to distill large volumes of information into clear commercial insights.
  • Strong communication and presentation skills, particularly in executive-level environments.
  • Ability to operate effectively within international, multicultural, and fast-paced transaction environments.
  • Ability to manage multiple priorities and demanding deadlines simultaneously.
  • Strong business acumen and understanding of market dynamics, competitive landscapes, and value creation levers.
  • Organizational skills, flexibility, and resilience under pressure.
  • Ability to contribute to commercial and business development initiatives.
Responsibilities
  • Lead Commercial Due Diligence projects and engagement teams, ensuring high-quality, insightful, and data-driven analyses to support strategic investment decisions.
  • Manage day-to-day client interactions and maintain relationships with Private Equity investors, corporate clients, and internal EY-Parthenon stakeholders globally.
  • Oversee assessment of market attractiveness, competitive positioning, growth opportunities, customer dynamics, and key value drivers of target companies.
  • Lead complex analyses and synthesize findings into actionable recommendations for clients involved in mergers, acquisitions, divestitures, and investment opportunities.
  • Drive project delivery across multiple workstreams, meeting transaction timelines and quality standards.
  • Contribute to proposals, capability presentations, client pitches, and thought leadership initiatives related to Commercial Due Diligence and Strategy Transactions.
  • Manage diverse and international teams, fostering collaboration, inclusion, professional development, and EY-Parthenon culture and values.
  • Mentor and coach junior professionals to support their technical, analytical, and professional growth.
  • Collaborate with global EY-Parthenon teams to enhance Commercial Due Diligence methodologies, tools, and best practices.
  • Support recruitment and talent development efforts to build and scale the Commercial Due Diligence team within the Portugal Business Hub.
Desired Qualifications
  • Previous international exposure or experience working on cross-border projects is highly valued.
  • A positive, entrepreneurial, and proactive mindset.

About the company

EY (Ernst & Young) provides professional services at a global scale, offering consulting, assurance, tax, and transaction advisory services. It serves clients across industries such as technology, media, real estate, hospitality, and construction. Instead of selling a single product, EY works with clients through tailored engagements where cross-disciplinary teams analyze challenges, design strategies, perform audits, help with tax planning, and assist with mergers or divestitures. What sets EY apart is its worldwide reach and integrated service model, industry-specific expertise, and focus on responsible business practices like sustainability, cybersecurity, and workforce flexibility. EY’s goal is to help organizations improve performance, manage risk, and achieve sustainable growth while building a better working world.

Company Size

5,001-10,000

Company Stage

N/A

Total Funding

N/A

Headquarters

Boston, Massachusetts

Founded

1991

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What believers are saying

  • EY.ai Agentic for Sales launched March 2, 2026 with Snowflake and Canva.
  • EY uses client-zero deployments, scaling Copilot across 400,000 people by May 2026.
  • EY’s 2026 AI assurance push monetizes client demand for governance, controls, and risk reviews.

What critics are saying

  • Sabah filed RM2.4 billion audit-negligence claims against EY on July 30, 2026.
  • EY set aside £188 million in March 2026 after NMC, Shell, and Made.com scrutiny.
  • Repeated audit failures can destroy trust, trigger client defections, and shrink the franchise permanently.

What makes Ernst & Young unique

  • EY Canvas processes 1.4 trillion journal-entry lines across 160,000 global audits.
  • EY-Microsoft invested US$1b+ in May 2026 to industrialize enterprise AI delivery.
  • EY launched agentic audit AI on April 7, 2026, spanning Assurance and AI assurance.

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Benefits

Professional Development Budget

Flexible Work Hours

Remote Work Options

Company News

Business Insider
Oct 8th, 2026
EY adds nearly 10,000 staff globally as AI revenue surges 50%

EY added nearly 10,000 staff globally in its 2026 financial year as AI-related revenue surged almost 50%. The Big Four firm's workforce reached 415,000, with most growth concentrated in global delivery services and offshoring centres. The Americas division saw headcount decrease by roughly 4,500, or 5%. Overall global revenue rose 4.7% to $57 billion. EY-Parthenon was the fastest-growing service line, with revenue increasing 7.4% to $6.8 billion, marking a turnaround after two years of minimal growth. Tax revenue rose 6% to $13.8 billion, whilst consulting grew 4.4% to $17.4 billion. The results reflect EY's "All-In" strategy under global chair Janet Truncale, with billions invested in transforming operations and AI services.

PR Newswire
Sep 9th, 2026
US oil producers hit record output as capital spending drops 49% and reserve replacement falls

An Ernst & Young study found US oil and gas producers reached record production in 2025 while becoming more selective with investments. The analysis of 30 major exploration and production companies, representing 43% of US oil and gas output, showed oil production hit a study-period high, yet reserve additions from extensions and discoveries declined 11% year over year and failed to fully replace production volumes for the first time since 2021. Total capital expenditures fell 49% year over year, whilst M&A spending declined 70%. Exploration spending dropped 11% to $4.8 billion, representing only 3% of total capital expenditures. Natural gas showed stronger fundamentals, with production rising 18%, reserves increasing 14%, and discoveries up 21%.

Yahoo Finance
Aug 31st, 2026
EY commits $100M to bonuses rewarding human skills alongside AI adoption

Ernst & Young's US division is allocating $100 million this fiscal year to bonus payments rewarding employees who demonstrate adaptability, innovation, and judgement. Individual spot awards reach $500, whilst employees or teams making significant contributions can receive between $10,000 and $25,000, five times the previous programme's ceiling. The initiative also covers AI experimentation. "What we recognise signals what we value," said Ginnie Carlier, chief talent and culture officer for EY Americas. The bonuses form part of a broader strategy to reshape employee development across all career levels. Other professional services firms are pursuing similar approaches. KPMG restructured its audit internship this summer to emphasise critical thinking, whilst PwC US introduced training combining AI proficiency with human qualities like empathy. EY reported AI-related revenue grew 30% year-over-year in 2025.

Consultancy.eu
Aug 28th, 2026
EY-Parthenon acquires Dutch digital strategy consultancy SparkOptimus

EY-Parthenon has acquired SparkOptimus, a Dutch digital strategy consultancy founded in 2010. The Amsterdam-based firm employs around 50 consultants and specialises in AI transformation, digital business model redesign and technology-driven transformation. SparkOptimus founders Alexandra Jankovich and Tom Voskes, both former McKinsey consultants, said joining EY-Parthenon will create significant value for clients and staff whilst providing access to broader capabilities. The acquisition marks EY-Parthenon's first European deal since 2021. EY-Parthenon, established in 2014, is EY's strategy consulting and transactions advisory business with around 25,000 professionals globally. Mark Reich, Partner at EY-Parthenon Netherlands, said SparkOptimus' expertise will complement existing capabilities in the Dutch market. The deal closes on 1 September 2026. Financial terms were not disclosed.

Yahoo Finance
Aug 18th, 2026
KPMG and EY win $579M UK civil servants training contract despite consultancy spending pledge

The UK Government has awarded a contract worth up to £456 million to KPMG and EY to train civil servants, the Financial Times reported, citing government procurement tracker Tussell. Under the arrangement, the firms will train officials across various skills areas, including AI, between 2026 and 2028. KPMG's share is capped at £319 million, representing almost a quarter of its total UK advisory net sales from last year. EY's portion is worth £137 million, equivalent to around 13% of its UK consulting revenue. The deal is the largest single contract awarded to Big Four companies since Tussell started tracking records in 2012. The previous record was a £322 million deal between the Foreign Office and PricewaterhouseCoopers in 2012.