Marsh McLennan tech stack
Marsh McLennan builds mostly with Python, SQL, JavaScript, TypeScript. Its stack also includes Power BI, Azure, React.js, Nest.JS. Python is named in 19 of the 52 job postings Marsh McLennan published in the last 12 months (37%). Counted by Alion from the job postings of Marsh McLennan, updated Oct 12, 2026.
What programming languages does Marsh McLennan use?
Python is named in 37% of job postings at Marsh McLennan, followed by SQL (29%), JavaScript (21%), TypeScript (15%).
Python
19 37%
SQL
15 29%
JavaScript
11 21%
TypeScript
8 15%
Node JS
6 12%
PowerShell
4 8%
C#
4 8%
SPSS
1 2%
Show all (10)
What frameworks and libraries does Marsh McLennan use?
React.js is named in 13% of job postings at Marsh McLennan, followed by Nest.JS (10%), Angular (8%), FastAPI (8%).
React.js
7 13%
Nest.JS
5 10%
Angular
4 8%
FastAPI
4 8%
Django
3 6%
LangChain
3 6%
CrewAI
2 4%
LangGraph
2 4%
Show all (19)
What databases does Marsh McLennan use?
MS SQL is named in 6% of job postings at Marsh McLennan, followed by PostgreSQL (4%), DynamoDB (2%), OpenSearch (2%).
What cloud and platforms does Marsh McLennan use?
Power BI is named in 21% of job postings at Marsh McLennan, followed by Azure (13%), AWS (12%), Windows (10%).
Power BI
11 21%
Azure
7 13%
AWS
6 12%
GitHub Actions
4 8%
Show all (33)
What developer tools does Marsh McLennan use?
Microsoft Excel is named in 17% of job postings at Marsh McLennan, followed by Rest API (6%), Copilot (4%), Git (4%).
Rest API
3 6%
Copilot
2 4%
Git
2 4%
Terraform
2 4%
Jenkins
1 2%
Kong
1 2%
Show all (10)
What AI and ML technologies does Marsh McLennan use?
LLM is named in 15% of job postings at Marsh McLennan, followed by Claude (6%), Gemini (4%).
Which engineering practices does Marsh McLennan ask for?
CI/CD is named in 12% of job postings at Marsh McLennan, followed by RAG (12%), AI Agents (10%), Prompt Engineering (10%).
CI/CD
6 12%
RAG
6 12%
AI Agents
5 10%
Prompt Engineering
5 10%
SLI/SLO/SLA
5 10%
Show all (29)
What does each Marsh McLennan team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Analytics
9 postingsBackend
7 postingsSupport
6 postingsEarly Careers
3 postingsHow does your stack fit Marsh McLennan?
How modern is the Marsh McLennan stack?
Marsh McLennan scores 83 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 1.
Companies with a stack like Marsh McLennan
Questions about the Marsh McLennan tech stack
What programming languages does Marsh McLennan use?
The languages named in Marsh McLennan job postings are Python (37%), SQL (29%), JavaScript (21%), TypeScript (15%), Node JS (12%), as a share of the 52 postings of the last 12 months.
Does Marsh McLennan use React.js?
Yes. React.js is named in 7 of 52 job postings (13%) and required in 7 of them.
What cloud and platforms does Marsh McLennan use?
The cloud and platforms named in Marsh McLennan job postings are Power BI (11), Azure (7), AWS (6) (postings in brackets).
What skills do you need for a Analytics job at Marsh McLennan?
Analytics postings at Marsh McLennan most often require Power BI (4), Python (4), SQL (3), Microsoft Excel (2), out of 9 postings in the last 12 months.
Is the Marsh McLennan tech stack changing?
No new technology has appeared in Marsh McLennan job postings in the last six months.
How modern is the Marsh McLennan tech stack?
Marsh McLennan scores 83 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 3; legacy ones: 1.
How does Alion know the Marsh McLennan tech stack?
Alion reads every job posting Marsh McLennan publishes and tags the technologies each one names. The figures on this page count the 52 postings of the last 12 months and were updated on Oct 12, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "Marsh McLennan tech stack: 109 technologies from 52 job postings", as of Oct 12, 2026. https://alion.io/company/marshmclennan/technologies