• •  City to City North America

    •  Movement Leaders Collective

    •  Forum for Congregational Life

    •  Lilly Endowment Inc.

    •  Community-based and nonprofit organizations

  • •  Local churches and congregations

    •  Multicultural and Latino churches

    •  Multi-site churches

    •  Parachurch organizations

    •  Ministry networks and faith-based partners

  • •  Broome County DSS

    •  Orange County DSS

    •  Youth Research / NYS OCFS

    •  NYC HRA / SUNY Buffalo

    •  Public agencies and organizational development initiatives

  • Leadership Development & Training

    •  City to City North America

    • Movement Leaders Collective

    • Leadership cohorts, workshops, and facilitated learning

    Administrative Support

    • Broadway Salon Suites

    • VZNHSUS

    • Pipe’s Pet Grooming

Organizations are listed to reflect the experience and affiliations of SIS Consulting and its team and do not imply endorsement.

Text saying 'Meet the Team' in elegant brownish font.

Nilza I. Oyola, MBA

Founder & Leadership Consultant

  • Nilza I. Oyola is an accomplished executive leader, leadership coach, ordained minister, author, and founder of SIS Consulting. Her career spans more than 20 years, including over 15 years in senior and executive roles helping leaders navigate growth, transition, and complexity.

    Nilza has served as Executive Director, Chief Operating Officer, and Senior Vice President across nonprofit, faith-based, education, and workforce-development organizations. Her expertise spans strategy, organizational development, program design, leadership development, operations, financial sustainability, and impact measurement.

    Known for translating complex challenges into practical solutions, Nilza strengthens the strategies, systems, and teams leaders need to build healthy organizations that thrive

Daniela Ocampo, Administrative Solutions Lead

Daniela Ocampo

  • Daniela leads the delivery and coordination of SIS Consulting’s administrative solutions. Her organized, solutions-focused approach helps clients manage priorities, improve workflows, and keep essential operations moving efficiently.

Administrative Solutions Lead

Sofia Ovalle, Administrative Solutions Specialist

Sofia Ovalle

  • Sofia provides dependable day-to-day administrative support, including scheduling, data management, client communication, document preparation, and workflow coordination—helping clients stay organized, productive, and focused.

Lead Organizational Development Consultant

Marvela L. Guice, M.S

  • Marvela Guice is an experienced organizational development and workforce training consultant specializing in leadership development, executive coaching, curriculum design, and capacity building. She partners with organizations to strengthen leadership, develop high-performing teams, and implement practical solutions that improve organizational effectiveness and long-term impact

    Contact information:
    Marvelaguice@yahoo.com
    (516) 978-1225

Administrative Solutions Specialist

Start a Conversation