Profile of Mercer Consulting

Within the broader Mercer organization, the consulting and advisory services are structured around the firm’s key business units: Health, Wealth, and Career. Each of these corresponds to a major pillar of Mercer’s offerings, and together they encompass the full spectrum of human capital issues. Mercer’s Health business unit (sometimes called Health & Benefits) delivers consulting on employer-sponsored health plans, insurance brokerage for benefits, wellness and well-being programs, and related products. It helps employers manage costs and improve outcomes for healthcare benefits, often leveraging data analytics and negotiating with healthcare vendors. The Wealth business unit (also known as Investments & Retirement) provides retirement consulting (for defined benefit pension plans and defined contribution/401(k) plans), actuarial services, and investment advisory/management. Mercer’s Wealth experts advise pension fund trustees and investment committees on asset allocation, manager selection, risk management, and also offer delegated investment solutions (Mercer manages portions of client portfolios directly). The Career business unit (Talent consulting) focuses on people strategy – helping clients with reward strategies (salary structures, incentive plans), talent assessments, career pathing, workforce analytics, and organizational design. It also includes Mercer’s consulting on workforce transition and upskilling, as well as its HR software implementation support (through Mercer Digital, which works on HR tech like Workday). These three units operate globally, and Mercer often deploys integrated teams for complex client projects – for example, a merger project might involve Mercer’s health consultants (to merge benefit plans), wealth consultants (to harmonize retirement programs), and career consultants (to realign job roles and pay scales).

Mercer’s consulting services are a core component of the Marsh McLennan enterprise, which describes itself as the world’s leading professional services firm in risk, strategy, and people. Within MMC, Mercer is grouped in the Consulting segment alongside Oliver Wyman. Mercer’s focus on “people” (human capital and investments) complements sister companies that focus on “risk” (Marsh in insurance brokerage and Guy Carpenter in reinsurance). Mercer frequently collaborates with these affiliates on client engagements that require multi-disciplinary expertise. For example, Mercer and Oliver Wyman have jointly advised on projects for the financial sector – such as assessing climate change risks for banks and insurers as part of United Nations initiatives – combining Oliver Wyman’s strategy insight with Mercer’s human capital and investment insight. In the Pacific region, Mercer has been working more closely with Marsh and other MMC businesses to deliver unified solutions: recently Marsh McLennan appointed a regional CEO to integrate offerings across Marsh, Mercer, Guy Carpenter, and Oliver Wyman, acknowledging that clients often need holistic advice across risk management, workforce strategy, and investments. This “one MMC” collaborative approach has been a strategic focus, ensuring Mercer’s consulting expertise enhances and is enhanced by the broader capabilities of the group.

It’s also worth noting that Mercer’s broader organization includes not just pure consulting, but also some outsourcing and products aligned with its consulting lines. For instance, Mercer has outsourcing units for benefits administration in some regions, investment management products (such as multi-manager funds and Mercer’s OCIO services), and data products like compensation surveys and benchmarking databases. These offerings are typically extensions of its advisory work – e.g., after consulting on retirement strategy, Mercer might take on ongoing management of a pension scheme’s assets. However, the core of Mercer’s identity remains advisory services in health, wealth, and career. In summary, Mercer’s consulting practice is the central driver of the Mercer business, and it dovetails with Mercer’s other solutions (like brokerage, investment management, or software tools) to provide end-to-end support in its domains. By structuring itself around the Health, Wealth, Career categories, Mercer aligns its internal organization with the key challenges faced by its clients, and this structure is a defining feature of the Mercer brand within Marsh McLennan.

Mercer operates in a competitive marketplace that includes both specialized human capital firms and broader professional services companies. Its primary direct competitors in the human resources consulting arena are firms like Aon (via Aon’s consulting divisions) and Willis Towers Watson (WTW), as well as the HR consulting arms of the “Big Four” accounting firms (Deloitte, PwC, Ernst & Young, and KPMG).

• Aon: Aon plc is a global professional services firm that, like Marsh McLennan, has businesses in insurance risk brokerage and human capital consulting. Aon’s Human Capital consulting capabilities are housed mainly in its Health Solutions and Wealth Solutions segments – which correspond to employee health & benefits and retirement consulting, respectively. In terms of size, Mercer’s consulting business is larger than Aon’s HR consulting segment. In 2022, Aon’s Health Solutions division had about $2.2 billion in revenue and its Wealth Solutions (retirement) about $1.4 billion, totaling roughly $3.6 billion related to human capital consulting. This is modest compared to Mercer’s ~$5+ billion. Aon historically expanded into this space through the acquisition of Hewitt Associates in 2010 (forming “Aon Hewitt”), and while Aon later divested some outsourcing units, it continues to offer strong benefits consulting and pension actuarial services. Aon and Mercer often compete for the same projects – for example, advising a Fortune 500 company on pension plan de-risking or helping a multinational redesign its health benefits strategy. Aon’s competitive edge is often its integration of consulting with insurance brokerage (it can place insurance contracts for benefits or pension risk transfers directly), whereas Mercer’s strength is in its depth of analytical consulting and investment advisory.
• Willis Towers Watson (WTW): WTW is another major rival, formed from the 2016 merger of Willis Group (insurance broker) and Towers Watson (HR consultancy). WTW similarly combines insurance brokerage with a significant human capital and benefits consulting practice. In 2022, WTW’s Health, Wealth & Career segment (which mirrors Mercer’s service scope) generated about $5.3 billion in revenue, essentially on par with Mercer’s revenue that year. This puts Mercer and WTW as the two largest players globally focused on benefits/HR consulting. WTW’s offerings (like Mercer’s) include employee benefits consulting, pension actuarial services, insurance exchanges, rewards consulting, and investment consulting. The two firms often go head-to-head for large clients – for instance, both are among the leading advisers for large pension funds in the UK, Canada, and U.S. A distinguishing aspect is that WTW also offers some proprietary software (like the Workday-based BenTech solutions and its historical Towers Watson risk modeling software). Mercer and WTW were even poised to become part of the same company when Aon attempted to acquire WTW in 2020; that merger was called off, and since then both WTW and Aon have been refining their strategies to compete with Mercer independently. In practice, clients might solicit proposals from Mercer, WTW, and Aon simultaneously for a project such as a global benefits benchmarking study or a multi-country pension plan valuation, indicating the triangular competition in this niche. All three firms are often mentioned together as the top tier in benefits consulting and HR advisory.
• Big Four and Other Management Consultants: Beyond these specialized competitors, Mercer also faces competition from the Big Four firms’ consulting divisions (Deloitte, PwC, EY, KPMG) and other consulting firms that have HR advisory practices. Deloitte, in particular, has a very large Human Capital consulting practice (within Deloitte Consulting) that is frequently ranked highly for HR transformation and technology consulting. In some rankings of HR consulting prestige and capability, Deloitte’s Human Capital group and Mercer alternate the top spots. The Big Four tend to focus on broad organizational and technology-driven HR projects – for example, implementing cloud HR systems, optimizing HR operations, and change management – and they often leverage audit/tax relationships to win HR consulting work. Mercer differentiates itself by its deep specialization in employee benefits, actuarial analysis, and investment consulting, areas where Big Four firms have smaller dedicated teams. That said, there is overlap: for instance, Mercer and PwC both advise on executive compensation and workforce analytics, and Mercer and Deloitte both compete in helping companies with HR strategy and change. Additionally, strategy consulting firms like McKinsey, Boston Consulting Group, and Mercer’s own sister company Oliver Wyman occasionally encroach on talent strategy projects, although they typically do not offer the end-to-end benefits and actuarial services that Mercer does. Niche firms such as Korn Ferry (Hay Group) also compete in the rewards and talent consulting space.

   

In summary, Mercer’s consulting business is highly competitive yet leading in its domain. It is often cited as the largest HR consulting firm globally, with Aon and WTW as its closest peers in benefits consulting, and the Big Four as significant players especially in HR technology and broader consulting. Mercer maintains its edge through a combination of scale (global resources and data), specialized expertise (credentialed actuaries, investment professionals, etc.), and integration of solutions (linking health, wealth, and career insights). Meanwhile, competitors like Aon and WTW leverage their dual roles as brokers and consultants, and Big Four firms leverage multi-disciplinary services. Clients making decisions in this space will consider Mercer’s track record and thought leadership (surveys, research like Mercer’s annual cost of living and talent trend reports) alongside the offerings of these competitors. The market is dynamic – for instance, recent years saw Aon and WTW sell off certain outsourcing units (to Alight Solutions) while Mercer acquired others – but Mercer has consistently remained at the forefront of human capital advisory in terms of market share and reputation.