# ProTelesis Corporation

> ProTelesis Corporation is a San Diego-based managed services provider (MSP/MSSP) born from the 2019 merger of two California telecom heavyweights - Protel (a leading Mitel Blue dealer) and Xtelesis (a leading Mitel Orange dealer). The company has evolved from a traditional phone-system business into a full-stack technology partner delivering managed IT, cybersecurity, unified communications, cloud, structured cabling, and managed detection and response. With offices across California, the Pacific Northwest, Utah, and Bangalore, it supports thousands of clients and hundreds of thousands of endpoints, with a focus on biotech, defense, and growing small-to-midsize businesses.

- **Founded:** 1988
- **Headquarters:** San Diego, California, United States
- **Founders:** Michael Promotico (CEO), Scott Strochak (CTO (former Xtelesis CEO)), David Krietzberg (CFO)
- **Team size:** Approximately 61 employees (per Apollo); 700+ combined man-years of team experience claimed.
- **Products:** Fully Managed IT, Co-Managed IT, Cloud Communication (VoIP) & Unified Communications, Cybersecurity, Compliance & MDR, Cloud Services
- **Notable:** Formed ProTelesis through the 2019 merger of Protel and Xtelesis - billed as the first major combined Mitel Blue and Mitel Orange company in the United States., Grown into one of the largest Business Phone System and Unified Communications providers in the US., Reports supporting 755,750 endpoints and thousands of clients.

## Products & services

- **Fully Managed IT** — End-to-end IT management and 24/7 monitoring for businesses that want to outsource their technology operations.
- **Co-Managed IT** — Augments an existing internal IT team with ProTelesis engineering, tooling, and helpdesk capacity.
- **Cloud Communication (VoIP) & Unified Communications** — Cloud phone systems, UCaaS, video conferencing, and contact center solutions, rooted in deep Mitel/ShoreTel expertise.
- **Cybersecurity, Compliance & MDR** — Zero-trust guidance, managed detection and response, and security/compliance services for regulated industries.
- **Cloud Services** — Infrastructure-, Desktop-, Backup-, and Disaster-Recovery-as-a-Service (IaaS, DaaS, BaaS, DRaaS).
- **Remote Helpdesk** — Support desk that answers 90% of calls within one minute and 99% within three minutes.
- **Physical Infrastructure & Structured Cabling** — Cabling, AV, and physical security infrastructure design and implementation.
- **Backup & Disaster Recovery** — Business continuity, backup, and DR planning to keep operations running through disruptions.

## Achievements

- Formed ProTelesis through the 2019 merger of Protel and Xtelesis - billed as the first major combined Mitel Blue and Mitel Orange company in the United States.
- Grown into one of the largest Business Phone System and Unified Communications providers in the US.
- Reports supporting 755,750 endpoints and thousands of clients.
- 31+ years of continuous operation serving Southern California and beyond.
- Answers 90% of support calls within one minute and 99% within three minutes.

## Latest updates

- **2026-01** — Published guidance for San Diego biotech, professional services, and retail decision-makers on choosing managed IT in 2026.
- **2025-05** — Refreshed partner technology roster including Veeam, Sophos, RingCentral, and others.
- **2019-08** — ProTelesis brand publicly unveiled following the Protel/Xtelesis merger.

## Links

- Website: https://protelesis.com
- LinkedIn: http://www.linkedin.com/company/protelesiscorp
- Twitter/X: https://twitter.com/protelesis
- Facebook: https://www.facebook.com/ProTelesisCorp/

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Profile page: https://yespress.io/protelesis-corporation
Published by YesPress — https://yespress.io
Last updated: 2026-06-20