teleSys Software, Inc.: Detailed Company Information & Corporate Profile
Summary
teleSys Software, Inc., founded in 1997 and headquartered in San Mateo, California, serves the telecom sector with a focus on network signaling solutions. The independent firm reports revenues between $10 million and $50 million and employs 100–200 staff.
teleSys delivers Diameter Signaling Controllers for CORE Routing, 2G/3G/4G roaming, session management, load balancing, and service mediation. They also provide SS7, SIGTRAN STP, intelligent routing, network signaling, and protocol mediation expertise.
Leadership includes owner Charles Sirois, COO Shaila Bahl, Senior HRBP Anshu Mahajan, Head of Pre‑sales Rafayel Khachikyan, and technical directors such as Sankar Chanda. The team supports engineering, project management, and customer success roles across the organization.
With a presence in the San Francisco Bay Area, teleSys leverages its deep domain knowledge to empower telecom operators with resilient, scalable signaling infrastructure that meets evolving 5G and legacy network demands.
| teleSys Software, Inc. Website | telesys.com |
| Social Links |  |
| Phone Number | 650-522-9922 |
| Industries | |
| teleSys Software, Inc. Headquarters Address | 1900 South Norfolk Street, San Mateo, California, 94403 US |
| Company Size | 100-200 employees |
| Specialities & Services | Diameter Signaling Controller for CORE Routing, 2G/3G/4G Roaming, Session Management, Load Balancing & Service Mediation;, SS7, SIGTRAN Signaling Transfer (STP), Intelligent Routing;, Network Signaling, Protocol Mediation; |
| DMA Code | San Francisco Bay Area |
| Founded | 1997 |
| Estimated Annual Revenue | $10M - 50M |
| Operating Status | Independent Company |
| Updated: | 2026-09-15 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 1987 | Privately Held | 1.0K - 5.0K | |
| 2008 | Public Company | 1.0K - 5.0K | |
| 1996 | Privately Held | 500 - 1.0K | |
| - | Privately Held | 100 - 250 |
Workforce Turnover
Number of employees switched from or switched to
Length of Employment
teleSys Software, Inc.'s workforce includes employees across a wide range of tenure levels.
6% have been with the company for 1 to 2 years8% have been with the company for 3 to 4 years11% have been with the company for 5 to 7 years6% have been with the company for 8 to 10 years69% have been with the company for more than 11 years
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teleSys Software, Inc. Corporate Information: FAQ
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