Fractional COO
Provide senior operational leadership to improve workflows, strengthen internal systems, support executive teams, and build scalable infrastructure for nonprofits managing growth, complexity, or organizational change.
One Abacus Advisory helps nonprofits in Washington DC strengthen operations, finance, and leadership capacity with flexible executive support. From board-ready reporting to grant compliance and transitional guidance, we deliver practical expertise that fits the pace, accountability demands, and funding complexity common across the DC nonprofit landscape.

Flexible executive and operational support designed to strengthen nonprofit performance, governance, and long-term sustainability.
Provide senior operational leadership to improve workflows, strengthen internal systems, support executive teams, and build scalable infrastructure for nonprofits managing growth, complexity, or organizational change.
Deliver executive-level financial leadership through budgeting, forecasting, reporting, compliance, and strategic advisory so nonprofit leaders and boards can make confident, mission-aligned decisions.
Guide nonprofit HR strategy, compliance, and people operations with part-time executive support that helps organizations build stronger teams without a full-time hire.
Manage grant portfolios and government contracting requirements with stronger reporting, compliance controls, and internal processes that reduce risk and support funder confidence.
Oversee day-to-day budgeting, cash flow, reporting, and accounting processes to improve accuracy, consistency, and visibility across nonprofit financial operations.
Step in during leadership changes or staffing gaps to maintain continuity, stabilize operations, and keep finance and administrative functions moving forward.
Nonprofits in Washington DC often balance board expectations, grant restrictions, and fast-moving program demands all at once. One Abacus Advisory provides right-sized leadership support across operations, finance, HR, and governance so organizations can improve clarity, strengthen compliance, and make better decisions without committing to a full-time executive hire.

Supporting nonprofit leaders through growth, transitions, reporting improvements, and stronger operational decision-making.
Nonprofits rely on us for practical leadership support that strengthens systems, reporting, and organizational confidence.
Deep nonprofit expertise supports stronger governance, compliance, and mission-aligned operational decisions.
Get executive-level leadership without the overhead of a permanent full-time hire.
We help Washington DC nonprofits deliver clear reporting for boards, funders, and oversight stakeholders.
Our guidance fits complex DC-area funding environments, leadership transitions, and multi-stakeholder operations.
Experienced advisors serving mission-driven organizations.

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 leadership services provide senior-level guidance in areas like operations, finance, HR, governance, and grants management. Instead of hiring multiple full-time executives, organizations can access experienced support on a fractional or project basis. This helps improve reporting, accountability, internal systems, and strategic decision-making while keeping staffing costs aligned with the nonprofit's size and stage.
Talk with our team about your nonprofit's leadership needs.
Seasoned finance and leadership guidance.
Specialized support for mission-driven organizations.
Flexible leadership without full-time overhead.
Share your organization's goals, challenges, or transition needs, and we'll outline practical next steps for tailored support.
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.