What departments does Quest Diagnostics have?

Quest Diagnostics has employees across 11 departments including Quality Assurance, Finance, Information Security, Operations, Sales.

What is the largest department at Quest Diagnostics?

The largest department at Quest Diagnostics is Finance with 4 employees.

Where are Quest Diagnostics employees located globally?

Quest Diagnostics has employees across 7 continents and 74 countries including Kenya, Egypt, South Africa, Niger, Ghana.

How has Quest Diagnostics's team size changed over time?

Quest Diagnostics's team has decreased from approximately 32K to 17K employees based on available data.

Quest Diagnostics Employee Directory

Q: Who are Quest Diagnostics's key employees and leadership?

Quest Diagnostics's key employees include: Executive Vice President And Chief Financial Officer: S. S., Chief Executive Officer And President: J. D., Ceo: A. D., Chief Executive Officer: P. Z., Chief Executive Officer: A. S..

Medical and Diagnostic LaboratoriesNew Jersey, United States10001+ Employees

Quest Diagnostics is a medical and diagnostic laboratory company based in Secaucus, New Jersey. It offers a broad menu of more than 3,000 tests and provides cancer diagnostics, anatomic pathology services, and interpretive consultation through a medical and scientific staff of about 900 MDs and PhDs. It serves about one in three adult Americans and roughly half of the physicians and hospitals in the United States. Its network includes laboratories in most major metropolitan areas and facilities in Mexico, the United Kingdom, and India, and it operates about 2,250 patient service centers. On a typical workday it processes testing for about 550,000 patients, and in 2026 it announced investments to enhance digital ordering and electronic health record connectivity.

Quest Diagnostics Global Highlights

North America
24K

United States Of America
24K
Mexico
123
Canada
33
Antigua And Barbuda
2
Panama
1
Dominican Republic
1
El Salvador
1
Honduras
1

Asia
645

India
537
Philippines
44
Pakistan
10
China
8
Japan
7
Viet Nam
6
Singapore
5
Indonesia
5
Malaysia
3
United Arab Emirates
3
Nepal
3
Russian Federation
3
Turkey
2
Iraq
2
Sri Lanka
1
Afghanistan
1
Israel
1
Kazakhstan
1
Bangladesh
1
Saudi Arabia
1
Cambodia
1

Europe
271

United Kingdom Of Great Britain And Northern Ireland
194
Germany
16
Ireland
14
Finland
9
France
5
Poland
4
Netherlands
4
Bulgaria
4
Spain
4
Italy
3
Greece
3
Hungary
3
Ukraine
2
Moldova
1
Slovenia
1
Austria
1
Portugal
1
Sweden
1
Belgium
1

South America
61

Colombia
24
Brazil
23
Ecuador
6
Chile
4
Argentina
3
Peru
1

Africa
46

Kenya
13
South Africa
11
Egypt
6
Ghana
3
Nigeria
2
Morocco
2
Ethiopia
2
Zimbabwe
2
Niger
1
Cameroon
1
Tunisia
1
Senegal
1
Zambia
1

Oceania
12

Australia
9
New Zealand
2
Fiji
1

Quest Diagnostics's Leadership

J. D.
Chief Executive Officer And President
Mobile Phone
Email
A. D.
Ceo
Mobile Phone
Email
P. Z.
Chief Executive Officer
Mobile Phone
Email
A. S.
Chief Executive Officer
Mobile Phone
Email
A. W.
Ceo, Founder - Ctp Solutions, Llc
Mobile Phone
Email
S. S.
Cfo - Southeast Region
Mobile Phone
Email
A. B.
Chief Quality & Regulatory Affairs Officer
Mobile Phone
Email
M. D.
Chief Commercial Officer
Mobile Phone
Email

Quest Diagnostics Employee Metrics

100%

50%

0%

2026

2025

Information Technology
Research
Sales
Engineering
Analytics
Other
Administrative
Community & Social Services
Supply Chain
Program & Project Management

Contact profiles from Quest Diagnostics

Name

Title

Contact Info

Location

Last Update

A. D.
Ceo
Mobile Phone
Email
United StatesConnecticut
Apr 16, 2026
C. E.
Executive Assistant / Office Of Cio
Mobile Phone
Email
United StatesNew Jersey
Feb 11, 2026
J. S.
President, Licensed Psychologist
Mobile Phone
Email
United StatesNew York
Sep 08, 2025
M. D.
Chief Commercial Officer
Mobile Phone
Email
United StatesMassachusetts
May 19, 2026
C. R.
Sr. Employee Relations Partner
Mobile Phone
Email
United StatesFlorida
Oct 18, 2025
K. W.
Senior Hr Enablement Partner
Mobile Phone
Email
United StatesNew Jersey
Nov 12, 2025
H. M.
Employee Relations Partner
Mobile Phone
Email
United StatesFlorida
Nov 19, 2025
P. Z.
Chief Executive Officer
Mobile Phone
Email
Nov 07, 2025
M. D. B.
Owner / Managing Director
Mobile Phone
Email
United StatesArizona
Oct 20, 2025
A. S.
Chief Executive Officer
Mobile Phone
Email
Oct 17, 2024

Frequently Asked Questions

What is Quest Diagnostics known for?

Quest Diagnostics was founded in 1967 operates in the Medical and Diagnostic Laboratories industry. The company's main headquarters is located in 500 Plaza Drive Secaucus, New Jersey 07094 United States; you can contact the main corporate office by phone at

+1-973-520-****

. Explore Quest Diagnostics's company overview page for more information.

What is Quest Diagnostics's most common email format?

Quest Diagnostics employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more Quest Diagnostics email formats with LeadIQ.

How many employees does Quest Diagnostics have currently?

Quest Diagnostics has approximately 32K employees as of June 2026. These team members are located across 6 continents, including North AmericaAsiaEurope.

Who are Quest Diagnostics's key employees and leadership?

As of June 2026, Quest Diagnostics's key employees include:

Chief Executive Officer And President: J. D.
Ceo: A. D.
Chief Executive Officer: P. Z.
Chief Executive Officer: A. S.
Ceo, Founder - Ctp Solutions, Llc: A. W.

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Quest Diagnostics Employee Directory

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