1,375 companies use Sizmek, based on their job posts and their employees' public profiles. From October 2025 to August 2026, 363 job posts named it. Performance Marketing roles mention it most.
Which companies name Sizmek in the most job posts?
GroupM has posted more jobs naming Sizmek than any other company: 235. All five companies are in Professional Services.
CompanyPostsPeopleRecent job post
GroupMProfessional Services · first seen Aug 202223514
"Ad Tech Ops “owns” the campaign setup process only within ad server platforms (building, trafficking, creative QA, activation, and reporting setup within CM360, Adform, Sizmek, Flashtalking, etc.)."AdTech Operations Manager, Jul 23, 2025
dentsuProfessional Services · first seen Jul 202313829
"CM360 campaign trafficking, Sizmek, IAS, campaign trackers and digital reporting"Senior Executive – Digital Ad Operations , Oct 9, 2026
Annalect IndiaProfessional Services · first seen Dec 2023975
"Setup and execute digital media campaigns using ad servers like Google Campaign Manager, Sizmek, Adform and Flashtalking etc."adops - analyst, Sep 23, 2025
Publicis GroupeProfessional Services · first seen Aug 20238632
"Robust experience with at least one major third-party ad server with site-side tracking (like DoubleClick, Atlas, or Sizmek)"Manager, Analytics, Dec 23, 2025
WPP MediaProfessional Services · first seen Jun 20257159
"Programmatic & Adtech Mastery: Advanced expertise across DSPs and buying platforms (DV360, Xandr, Taboola, Sizmek, etc.)."Media Solutions Growth, Director, Nov 4, 2026
Job posts mentioning Sizmek went from 0.15 to 0.17 in every 10,000 job posts, comparing March to May with June to August 2026. One company accounts for most of that change.
Show the data
Month
Job posts naming Sizmek
All job posts
Per 10,000
Oct 2025
37
1,413,673
0.26
Nov 2025
55
1,822,119
0.30
Dec 2025
21
1,236,103
0.17
Jan 2026
43
1,828,002
0.24
Feb 2026
30
1,856,647
0.16
Mar 2026
35
1,850,711
0.19
Apr 2026
22
1,728,886
0.13
May 2026
25
1,821,509
0.14
Jun 2026
32
1,909,496
0.17
Jul 2026
30
1,815,180
0.17
Aug 2026
33
1,835,698
0.18
How many companies named Sizmek in a job post for the first time in recent months?
Sizmek showed up in job posts at 8 companies for the first time from June to August 2026, and 10 in the three months before. From October 2025 to August 2026, 35 companies named it in a job post for the first time.
March to May 202610
June to August 20268
October 2025 to August 202635
Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.
How do we know which companies use Sizmek?
We found 1,375 companies that use Sizmek, 925 of them through employees' profiles alone. 105 show up in both job posts and employees' profiles.
How we knowCompaniesShare
Job posts name Sizmek
45033%
Employees' profiles list Sizmek
92567%
1,375 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use Sizmek?
Sizmek's users look like the average tech page by size. The largest group is companies with 50 to 999 employees, at 42%. 263 of its companies have more than 5,000 employees.
Share of its companies
Typical tech page
ShareTypical
Under 50 employees
21%22%
50 to 999
42%38%
1,000 to 5,000
18%17%
Over 5,000
19%23%
Where are Sizmek companies based?
Beyond the United States (42%), Sizmek is unusually common in Spain, at 4.9% of its companies. The United Kingdom is second, at 8.4%.
ShareTypical
United States
42%43%
United Kingdom
8.4%6.4%
Australia
5.7%2.2%
Spain
4.9%1.8%
India
4.7%6.9%
France
4.4%4.6%
Companies in 59 countries and territories. Shares are of companies with a known headquarters country.
Show the data
Country
Companies
Share
Typical tech page
United States
550
42%
43%
United Kingdom
110
8.4%
6.4%
Australia
74
5.7%
2.2%
Spain
64
4.9%
1.8%
India
61
4.7%
6.9%
France
57
4.4%
4.6%
Which teams work with Sizmek?
Sizmek sits mostly with ad operations teams (30 companies). Analytics teams are second, at 9 companies, and digital teams third, at 8.
TeamCompanies
Ad operations
30
Analytics
9
Digital
8
Account management
7
Adops
7
Advertising operations
7
What else do Sizmek companies use?
The tool most tied to Sizmek is Integral Ad Science. 13% of Sizmek companies use it, 212 times the usual rate for their size. Among the tools listed here, Google DoubleClick is the most widely used, at 32% of Sizmek companies.
Share of the 360 Sizmek companies counted here whose job posts also name the tool
Typical for companies the same size
Which companies started naming Sizmek in job posts recently?
11 companies with 50 or more employees picked up Sizmek in their job posts from April to August 2026. Zoo Media leads the new commercial companies, with 4 job posts from April to August.
Companies that named Sizmek in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.
Which roles mention Sizmek most?
No single role dominates for Sizmek; Performance Marketing leads with 12% of the job posts. Account Manager is second, at 12%.
RoleSharePosts
Performance Marketing
12%44
Account Manager
12%42
Marketing
8.8%32
Digital Marketing
6.9%25
Sales
6.3%23
Marketing Analyst
5%18
Show the data
Role
Share
Oct 2025 to Aug 2026
Mar to May 2026
Jun to Aug 2026
Performance Marketing
12%
44
10
13
Account Manager
12%
42
4
14
Marketing
8.8%
32
5
6
Digital Marketing
6.9%
25
2
6
Sales
6.3%
23
7
4
Marketing Analyst
5%
18
4
5
About this data
Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.
Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.
Sumble has a free plan, and the same data is available through its API and MCP server.
A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.
Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.
