Fractional COO
Senior operational leadership that improves workflows, internal systems, team alignment, and organizational accountability so nonprofits can scale responsibly and stay focused on mission delivery.
One Abacus Advisory helps nonprofits in Washington DC strengthen operations, finance, HR, and grant infrastructure with flexible senior-level support. From board-ready reporting to systems that stand up to complex public funding requirements, we help mission-driven organizations build the internal capacity needed for steady growth, stronger compliance, and confident leadership.

Flexible advisory services that strengthen nonprofit finance, operations, systems, and leadership capacity.
Senior operational leadership that improves workflows, internal systems, team alignment, and organizational accountability so nonprofits can scale responsibly and stay focused on mission delivery.
Executive-level financial leadership for budgeting, forecasting, reporting, compliance, and board support, giving nonprofits stronger oversight without the cost of a full-time hire.
Support for grant portfolios and government contracts with stronger compliance, reporting accuracy, and internal processes that reduce risk and protect funder confidence.
Fractional HR guidance that strengthens people operations, compliance, onboarding, and organizational development for healthier, mission-aligned nonprofit teams.
Hands-on oversight of accounting, cash flow, forecasting, and reporting to improve reliability, transparency, and day-to-day financial decision-making.
Implementation and optimization support for HRIS, payroll, ERP, and accounting systems that improve efficiency, accuracy, and cross-functional coordination.
Our capacity building services help Washington DC nonprofits strengthen the internal systems behind mission delivery. Whether your organization is managing federal grants, preparing board reports, navigating leadership change, or modernizing finance and HR processes, One Abacus Advisory provides right-sized senior support that improves clarity, compliance, and long-term resilience without requiring multiple full-time executive hires.

See how nonprofits strengthen systems, reporting, and leadership capacity with experienced advisory support.
Nonprofits rely on us for practical leadership, financial clarity, and systems that support sustainable growth.
Dedicated nonprofit expertise across finance, operations, grants, and board-facing leadership support.
Right-sized executive guidance helps Washington DC organizations add capacity without full-time overhead.
We help nonprofits manage reporting, controls, and public funding requirements with greater confidence.
Clear, actionable reporting supports stronger decisions for executives and boards across the DC nonprofit landscape.
Experienced advisors supporting nonprofit leaders with practical guidance.

Founder, Consulting CFO
Lorin Port is the Founder and Consulting CFO of One Abacus Advisory, bringing over 25 years of finance and accounting experience to the nonprofit sector. With a dedicated focus on nonprofit financial leadership for the past nine years, Lorin specializes in fractional CFO and COO services, nonprofit accounting, and NetSuite optimization. He has partnered with prominent organizations such as the San Diego Food Bank, Philadelphia Zoo, and Laguna Playhouse, delivering strategic financial guidance during periods of growth, transition, and complexity. Lorin is committed to empowering nonprofit leaders and boards with clear, actionable insights that drive stronger decisions and long-term organizational health. His flexible, right-sized approach ensures each client receives tailored support that aligns with their unique mission and operational needs.
Nonprofit capacity building services strengthen the internal systems that support mission delivery. This can include financial leadership, operational management, HR infrastructure, grants administration, board reporting, and technology improvements. The goal is to help organizations operate more effectively, stay compliant, make better decisions, and build long-term resilience rather than simply solving one short-term issue.
Talk with our team about your nonprofit's next steps.
Supporting nonprofits with flexible advisory services across Washington DC and surrounding organizations with regional needs.
Remote & Advisory
Service Model
By Appointment
Consultations
Washington DC
Coverage
Ask about service availability for your nonprofit team.
Deep finance and accounting leadership experience.
Focused support for mission-driven organizations.
Executive guidance without full-time overhead.
Tell us about your organization's goals, challenges, and current systems. We'll follow up with practical next steps and tailored advisory options.
For immediate assistance, feel free to give us a direct call at +1 760-845-3808. You can also send us a quick email at lorin@oneabacusadvisory.com.
For immediate assistance, feel free to give us a direct call at +1 760-845-3808. You can also send us a quick email at lorin@oneabacusadvisory.com.