3SL Information

View Top Employees from 3SL

Developer of the requirements management and systems engineering tool "Cradle" and the provider of related training and consultancy services. 3SL has extensive experience in the integration of software tools and in the definition, deployment and management of requirements management and systems engineering services. We have specific experience in several industry sectors, including aerospace, defence, space, automotive and nuclear.

Website	http://www.threesl.com
Revenue	$5.1 million
Employees	25 (9 on RocketReach)
Founded	1987
Phone	+1 256-971-9500
Fax	(256) 971-9800
Technologies	JavaScript , HTML , PHP +30 more (view full list)
Industry	Software Development, Business Services General, Computer, Business Services, Consumer Electronics, Hardware, Software
Web Rank	3 Million
Keywords	Requirements Management, Systems Engineering, Requirements Management Tools, Systems Engineering Tools, Tool Integration, Training Courses, Consultancy Services, Software Development, Mbse, Model Based Systems Engineering, Requirements Traceability, Systems Design, Technical Training, Engineering Consultancy, Software Deployment, Project Management, Process Improvement
Competitors	IBM, Red Hat, Atlassian, OpenText, GitLab, Wizeline Academy, Novell, Docker, Inc, Puppet, Jenkins +49 more (view full list)
SIC	SIC Code 73 Companies, SIC Code 737 Companies
NAICS	NAICS Code 541511 Companies, NAICS Code 541 Companies, NAICS Code 54 Companies, NAICS Code 54151 Companies, NAICS Code 5415 Companies

3SL Questions

What is the annual revenue of 3SL?

The 3SL annual revenue was $5.1 million in 2026.

Who is the Technical Director of 3SL?

Mark Walker is the Technical Director of 3SL.

How many people are employed at 3SL?

9 people are employed at 3SL.

What is the NAICS code for 3SL?

The NAICS codes for 3SL are [541511, 541, 54, 54151, 5415].

What is the SIC code for 3SL?

The SIC codes for 3SL are [73, 737].

Top 3SL Employees

Mark Walker

Technical Director at 3SL

Barrow-in-Furness, GB
1
- threesl.com
3
- +44 910 575 XXXX
- +1 256-971-XXXX
- +44 910 575 XXXX
Marie Bellman

Operations Manager at 3SL

Huntsville, AL, US
3
- threesl.com
- gmail.com
- charter.net
5+
- +1 256-337-XXXX
- +1 479-430-XXXX
- +1 256-722-XXXX
- +1 256-609-XXXX
- +1 256-468-XXXX
- +1 256-971-XXXX
Dave Priestley

Systems Administrator at 3SL

Lancaster, GB
1
- threesl.com
Mikki Hall

Support Engineer at 3SL

Barrow-in-Furness, GB
1
- threesl.com
Shuang Liu

Software Engineer at 3SL

Lancashire, GB
1
- threesl.com
Barry Anderson

Senior Software Engineer at 3SL

England, United Kingdom