Strategic Location
Operate from a premium Washington DC address near transit, federal agencies, and major business corridors.
Trusted Since 1981
Why Professionals Choose OSI Offices in Washington DC
OSI blends location credibility, decades of operating experience, and modern business infrastructure to give members reliable office support without rigid overhead.
Prime K Street Address
Transparent Terms
Core Advantages
A Stronger Workspace Foundation for Your Business
Every OSI service decision is designed around business continuity, client perception, and practical flexibility.
Flexible Terms
Month-to-month plans and adjustable services let you scale without long contracts or setup penalties.
Modern Infrastructure
Manage mail, communication workflows, and bookings through digital systems built for remote and hybrid teams.
High ROI Operations
Access enterprise-level office support at a fraction of traditional lease and staffing costs.
Experienced Team
Our front desk and operations staff support your account with consistent, detail-focused execution.
Long-Term Stability
OSI has continuously served the DC market for over four decades under consistent ownership and standards.
40+
Years Serving DC
5000+
Businesses Supported
1629
K Street NW Location
0
Setup Fees on Base Plans
Industry Fit
Solutions for Distinct Professional Needs
OSI supports specialized workflows for legal, healthcare, and growth-stage businesses that need trust and flexibility.
Attorneys
Built-in alignment for legal workflows including handling expectations, professional presentation, and client-facing support.
Explore Attorney PlansMental Health Professionals
Private, calm, and professional environments trusted by practitioners who prioritize confidentiality and client comfort.
Explore MHP SolutionsStartups and Consultants
Establish a high-credibility footprint quickly and scale from virtual operations into dedicated space over time.
Explore Startup Options
Legacy
Four Decades of Practical Innovation
Founded in 1981 by C. Jack Pearce, OSI began by serving attorneys who needed a credible Washington DC presence. Over time, that foundation evolved into a broader office platform for modern professionals across industries.
Today OSI combines traditional service discipline with modern systems for mail, communication, and scheduling. Members benefit from proven operational consistency while retaining the flexibility to adapt services as business needs change.
See if OSI Fits Your Workflow
Review plans, compare service options, and choose the setup that gives your business immediate credibility and long-term flexibility.