Managed VOIP services

Diamond IT’s Managed VOIP keeps your firm connected with reliable, crystal-clear calling and flexible features designed for modern professional services. Say goodbye to dropped calls and outdated phone systems.

Years in Business

9.7/10

Client Satisfaction Rating

99.99%

Average Client Uptime

From IT headaches to smooth operations

Outdated phone systems slow down communication and frustrate staff. Diamond IT simplifies your voice network with dependable VOIP solutions that scale with your business, reduce downtime, and keep your team focused on clients.

Get seamless onboarding with zero downtime migration

Precision Audit

We start by understanding your current technology, business goals, and pain points.

Strategic Roadmap

Our team develops a tailored IT roadmap focused on your specific business needs, not a one-size-fits-all package.

Fortify

We roll out secure, fully managed IT solutions with no disruption to your daily operations.

Transform

Our team watches your systems 24/7, spotting and fixing issues before they cause problems.

Advanced calling features with expert support

Reliable voice quality

Crystal-clear calls backed by a secure network keep your conversations professional and uninterrupted. We proactively monitor performance to stop issues before they disrupt your business.

Keep every call clear

Experience the difference of business-grade voice quality that reflects your firm’s professionalism. With Diamond IT’s Managed VOIP, every client interaction is sharp, consistent, and dependable.

Advanced features for modern firms

Move beyond basic phone lines with smart features designed for professional services. From call forwarding to voicemail-to-email, your team stays connected wherever they work.

Upgrade how you communicate

Give your team the tools they need to stay productive and responsive. Diamond IT makes advanced features simple, reliable, and always available.

Cost control and predictability

Eliminate the hidden costs of outdated phone systems. With VOIP, you get one predictable monthly rate and avoid expensive infrastructure upgrades.

Simplify your billing

Take control of your communications budget with transparent pricing that supports growth without surprises.

Built-in security and compliance

Your calls and data are protected with secure VOIP systems that meet industry compliance standards. Professional firms can communicate with confidence knowing sensitive information stays private.

Communicate with confidence

With Diamond IT, security isn’t an add-on—it’s part of every solution. Keep client data and communications safe with our Managed VOIP.

Why professional service firms choose Diamond IT

Most IT companies sell you what they have in stock. We build technology solutions around what your business actually needs, not what’s easiest for us to deliver.

Competitors

20 years in business

Less experienced

97% CSAT score

85% or less

97% client retention rate

90% or less

Live Technical support

Non-technical call center

80% 1st call resolution

70% or less

Specialized

Generalists

Protect your firm’s data, maximize uptime, and eliminate IT headaches

See what our clients are saying

We support the software that powers your business

Diamond IT keeps your communication tools running smoothly by managing integrations and updates. From VOIP systems to collaboration software, we handle the technology so your staff can focus on client service.

Let us know what you’re looking for and see if we’re a good fit

Industries we support

Diamond IT’s Managed VOIP is built for professional services organizations that rely on secure, dependable communication to serve their clients.

Law firms

Secure, reliable calling supports case deadlines and client meetings.

Accounting firms

Flexible features help staff stay responsive during tax season.

Financial advisor firms

Guard sensitive client data and meet regulatory standards with confidence.

Architectural firms

Remote-ready calling connects teams across sites and projects.

Engineering firms

Dependable systems keep collaboration moving forward.

Insurance firms

Fast, reliable communication streamlines claims and client service.

Consulting firms

Multi-device access supports consultants in the field.

Medical services

Secure, compliant calls protect sensitive patient data.

Other professional services

Custom VOIP solutions scale with specialized business needs.

Discover how seamless IT can transform your firm’s efficiency & security

Sleep well at night knowing that you have Diamond IT.

“At the end of the day when you leave here and you shut down your machine, you know that your client’s data is safe and it’s secured and you don’t have to worry…You don’t have those concerns anymore. That’s somebody else’s concern. You go home, you go to bed, sleep well at night knowing that you have Diamond IT taking care of you.”

Get expert IT support trusted by businesses like yours

“They never upsold us, which was really important. They never tried to get us to the the next latest and best. They looked, for solutions for us, not profits for them.”

Jim Karp

Charles, Blank & Karp, LLP

Meet the Diamond IT team

Behind every fast response and smart solution is a real person who understands your business. Our team combines technical know-how with industry experience to support your firm with care and clarity. We don’t hide behind tickets—we work alongside you.

Matt Mayo

CEO

Jon Fitrzyk

VP of Managed Services

Garret Ullal

Director of Platform Engineering & Strategic Automation

Cody Cooper

Strategic Services Manager

Serving clients nationwide

Headquartered in California and Indiana, we support clients across the U.S. Our remote tools, local techs, and flexible support model make it easy to work with us—no matter where you are.

West Coast Branch

Service area: Bakersfield, Encino, Tulare, Los Angeles

Midwest & Eastern Branch

Service area: Indianapolis