The telephone company that refused to stay a telephone company - and rewired itself into a full-stack IT partner.
A freezer alarm pings. A sequencer needs the network. Someone in accounting can't log in, and a sales rep is dialing a customer over a phone system nobody on staff fully understands. Nobody in the building is a network engineer. They don't need to be - because somewhere across town, a ProTelesis dashboard already flagged the login, the call routed cleanly, and the freezer stayed cold. This is what a managed services provider actually does: it makes the technology disappear.
ProTelesis Corporation sells the absence of crisis. It is, in the most literal sense, an organization whose best work is the work you never notice. And the strange thing about a company like this is that the more invisible it becomes, the more indispensable it is.
For most of its life, ProTelesis was two companies. Protel was one of California's leading Mitel “Blue” dealers. Xtelesis, up in Burlingame, was a leading Mitel “Orange” dealer. In the telecom channel, those colors mark different product lineages - the kind of distinction that usually keeps companies in separate corners.
In March 2019, they agreed to terms. By August, the combined entity had a new name stitched from both: ProTelesis. Industry watchers called it the first major company to unite the Mitel Blue and Mitel Orange worlds in the United States - a rare two-color house built to serve legacy ShoreTel, InterTel, and Mitel customers under one roof.
CEO Michael Promotico led Protel into the deal, framing it as part of an “accretive growth” plan. Xtelesis CEO Scott Strochak became the technology brain of the merged company. Industry veteran David Krietzberg joined as CFO to make the numbers work.
A traditional telecom company sells you a phone system and walks away. ProTelesis kept the phones, then absorbed everything around them. Today the company runs as a managed services provider (MSP) and managed security services provider (MSSP), bundling the whole technology stack into one accountable relationship.
Outsource it entirely, or augment the team you already have - 24/7 monitoring either way.
Zero-trust guidance and managed detection & response for regulated, always-on operations.
Cloud VoIP, UCaaS, video, and contact centers - rooted in deep Mitel/ShoreTel expertise.
IaaS, DaaS, BaaS, and DRaaS - every flavor of the cloud, spoken fluently.
90% of calls answered within one minute, 99% within three. A number they publish on purpose.
Structured cabling, AV, and physical security - the cables in the walls, not just the bits.
ProTelesis is unusually willing to commit to a stopwatch. The published support-response figures are the closest thing an MSP has to a storefront window.
ProTelesis aims squarely at San Diego's innovation economy - biotech, defense contractors, and growing small-to-midsize businesses - alongside government agencies and semiconductor manufacturers. These are organizations where a network outage isn't an inconvenience, it's a compliance event. The pitch is simple: one vendor, one accountable partner, for the whole technology stack, from the cloud down to the cable in the wall.
What can you actually do with them? Hand over the parts of IT you'd rather not staff for. A 20-person startup gets enterprise-grade security without hiring a CISO. A multi-site firm gets one phone system that behaves the same in every office. A regulated lab gets monitoring that never sleeps. The product, in the end, is peace of mind with an SLA attached.
The lineage that becomes ProTelesis begins serving California businesses with telecom systems.
Protel Communications and Xtelesis agree to merge; David Krietzberg joins as CFO.
The combined brand goes public - the first major Mitel Blue + Orange house in the US.
Partner roster broadens across security, backup, and UC - Veeam, Sophos, RingCentral and more.
Publishes guidance for San Diego decision-makers choosing managed IT in a compliance-first era.
The login that tripped the alarm? Already cleared. The sequencer has its bandwidth. Accounting is back in. The sales rep finished the call and never knew the phone system had a vendor at all. Nobody in that San Diego lab will think about ProTelesis today, and that is precisely the point.
A company born from two phone dealers spent three decades quietly becoming the thing that keeps modern businesses upright. The phones still ring - they just ring through a stack of cybersecurity, cloud, and round-the-clock monitoring now. ProTelesis didn't change the scene by adding noise. It changed it by removing the alarms before anyone heard them.