Senior staff | Department of Revenue

Kathleen McColgan

Revenue Commissioner – Chief Collections Officer

Kathleen McColgan was appointed Acting Revenue Commissioner in October of 2023 and officially retained in her position by the Parker administration in February 2024. Prior to her appointment, McColgan served as the First Deputy Revenue Commissioner from 2019 to 2023. She has been a part of Revenue’s leadership team since 2014.

Throughout her 25-year tenure, McColgan has demonstrated dedication to funding critical City services and the School District through maximized revenue collections and has prioritized improving the customer experience for internal and external stakeholders. As the Director of Continuous Improvement between 2017-2018, McColgan established key metrics and benchmarks to measure Revenue’s performance and increase efficiencies across several key areas of the Department. She also implemented solutions that delivered faster and more transparent service to customers.

In collaboration with the Department’s committed staff, she has led the Department through several technology upgrades which include the modernization of a 35-year-old tax system. McColgan provided leadership and worked in collaboration with staff throughout the Covid-19 pandemic to quickly implement innovative solutions required to maintain critical services and funding while prioritizing the health and safety of staff and citizens.

McColgan is a Pierce College Graduate with a bachelor’s degree in business administration and management and has received national accolades for leadership and service.

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ShaRonn Mitchell

Deputy Revenue Commissioner - Administration

With more than 15 years of public service experience, ShaRonn has held leadership roles in human resources, administration, operations, recruitment, and workforce planning across several City departments. His previously served as the Director of Administration at the Department of Revenue, Human Resources Supervisor at the Philadelphia International Airport, and City Recruiter and Senior Personnel Analyst with the Office of Human Resources.

In his role as Deputy Revenue Commissioner, ShaRonn oversees human resources, fiscal management, procurement, contracts, payroll, training, employee relations, benefits, office services, and mail processing. He leads a team of nearly 45 employees who support a department of more than 600 staff members.

Throughout his career, ShaRonn has focused on building strong teams, improving processes, supporting organizational effectiveness, and helping employees succeed. He is passionate about leadership, workplace culture, employee experience, and the connection between personal and organizational values.

ShaRonn has a master’s degree from La Salle University and is pursuing a PhD in Organizational Psychology. He is a lifelong Philadelphian who graduated from Martin Luther King High School, Community College of Philadelphia, Temple University, and La Salle University.

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Paul Danella

Deputy Revenue Commissioner – Taxes and Fees

Paul Danella was appointed Deputy Revenue Commissioner for taxes and fees in July 2024. He oversees the Taxpayer Services, Accounting and Compliance Divisions. A key function of his role is to develop and implement strategies that drive efficiency in Revenue’s tax collection and compliance programs.

Mr. Danella has been a Revenue employee for over 17 years. His previous positions include Director of Taxpayer Services, Director of Collections, as well as Director of Accounting Control and Special Projects. During the department’s transition to its new integrated tax system, Mr. Danella served as Lead Subject Matter Expert.

He holds a Bachelor of Arts degree from Penn State University and a Master of Public Administration degree from Widener University.

Susan M. Crosby

Deputy Revenue Commissioner – Water Revenue Bureau (WRB)

Susan M. Crosby was appointed to the position of Deputy Revenue Commissioner in charge of the Water Revenue Bureau (WRB) in November 2020. In this role she oversees the Accounting, Collections, Customer Assistance, Customer Operations and Technical Operations Divisions. The core function of WRB is the daily generation and collection of water bills for the City of Philadelphia.

Prior to her appointment as Deputy Revenue Commissioner, Mrs. Crosby worked as a Divisional Deputy City Solicitor for the City’s Law Department. During her eight-year tenure in the Law Department’s Tax Unit, she represented the City’s legal interests in the collection of delinquent business tax and water/sewer debts, managed the Mass Revenue Litigation Division’s operations, and supported both the Revenue and Water Departments in rate proceedings.

Mrs. Crosby has a Bachelor of Sciences from Florida State University. She received her Juris Doctorate from Stetson University College of Law and is admitted to practice in Florida (inactive) and Pennsylvania. A Florida native, Mrs. Crosby is a Girl Scout Service Unit and Troop Leader.

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Marco A. Muniz

Deputy Revenue Commissioner – Collections

As Deputy Commissioner for Collections, Marco Muniz is responsible for establishing, implementing, and monitoring enforcement strategy for all debts owed to the City of Philadelphia and the Philadelphia School District.

Prior to his appointment as Deputy Revenue Commissioner, Mr. Muniz worked as a Divisional Deputy City Solicitor for the City’s Law Department. During his nine-year tenure within the Law Department’s Tax Unit, he represented the City’s legal interests in the collection of delinquent business tax and water/sewer debts, and managed the day-to-day operations of the Tax Administration Division.

Mr. Muniz has a Bachelor of Arts from the University of Delaware. He received his Juris Doctorate and Master’s degrees with honors from Widener University School of Law, and is admitted to practice in Pennsylvania.

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Rebecca Lopez Kriss

Deputy Commissioner for Policy, Outreach, and Taxpayer Assistance Programs

As Deputy Revenue Commissioner, Rebecca Lopez Kriss leads Revenue’s inter-governmental affairs and policy group, oversees technical tax staff, outreach and communication teams, and the taxpayer assistance and tax credit group. Her efforts support the Department’s behavioral science initiatives, including data-driven communications projects, and improving and expanding outreach efforts.

Before her appointment in 2019, she was a Revenue Senior Policy Analyst and the Director of Strategic Outreach. Formerly, she was the Director of Marketing and Communications for the Philadelphia Department of Commerce, where she supported the creation of the Startup PHL Call for Ideas program, working to attract and retain tech firms in Philadelphia.

With a passion for civic engagement, she strives to enhance service delivery and improve the quality of life for all Philadelphians. She holds a Master of Public Policy from the Gerald R. Ford School of Public Policy, University of Michigan.

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Frances Ruml Beckley

Chief Revenue Counsel

As Chief Counsel to the Revenue Department, Frances Ruml Beckley is responsible for leading the Tax and Revenue Unit, for enforcing the collection of Philadelphia taxes and agency receivables, for advising the administration and City Council on tax issues, and for representing the City in trial and appellate tax cases.

Frances served as chief counsel from January 2011 to February 2014. From March 2014 to April 2016, she worked in the Appeals and Legislation Unit of the Philadelphia Law Department, where she focused primarily on tax legislation and served as Counsel to the Philadelphia Water, Sewer & Storm Water Rate Board. Before coming to the City full-time, she did consulting work for the Tax Unit and had worked in large law firms (including Drinker Biddle and Ballard Spahr) representing taxpayers in federal, state, and local tax matters. She graduated from Harvard College, Yale Law School, and NYU’s LLM in Taxation program. Immediately after law school, she clerked for the Honorable Jose Cabranes (before his elevation from the District of Connecticut to the Second Circuit) and the Honorable Walter Stapleton (Third Circuit). She is a past chair of the Philadelphia Bar Association’s State and Local Tax Committee and an adjunct professor at Temple University’s Beasley School of Law.

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Mark Harvey

Director of Operations – Water Revenue Bureau

Mark Harvey started working with the City of Philadelphia in 1988. He has 30 years of service with the Department of Revenue’s Water Revenue Bureau.

Mr. Harvey earned a BBA with a major in accounting from Temple University.

Roman Strakovsky

Chief Data and Research Officer

As Chief Data and Research Officer, Roman Strakovsky leads and manages the Data and Research Unit within the Department of Revenue. This group is responsible for designing and maintaining data and research analytics used by the City’s financial decision-makers and stakeholders.

Roman joined the Department of Revenue in 2010 as a senior research analyst in the Data and Research Unit. Before his current role, he was the Director of Data Intelligence. His accomplishments include managing Revenue’s successful data warehouse implementation and working with City Council to analyze the impact of proposed changes in the Business Income and Receipts Tax (BIRT) reform legislation.

Before joining Revenue, Roman worked as a program analyst for the United States Department of Health and Human Services. He is passionate about public service and holds a BA in Sociology and Statistics from the University of Maryland.

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Yassine Sellami

Executive Project Director

Yassine Sellami is the Executive Project Director for the Department’s Integrated Tax System. He oversees the system’s operations, transformation efforts, security, compliance, and continuous improvement initiatives that support departmental goals. He is passionate about building systems that serve Philadelphia residents and businesses.

Yassine joined Revenue in May 2026, bringing more than 18 years of experience leading large-scale technology projects across the private sector and higher education.

Prior to joining the City, he served as Director of Research Systems and Analytics at Drexel University, where he led enterprise technology initiatives supporting the university’s research enterprise and digital transformation efforts across multiple colleges and administrative units. He has extensive experience leading cross-functional teams and guiding organizational change.

Yassine holds an MBA and a Digital Transformation Certificate from Drexel University and is pursuing a Doctorate in Education (Ed.D.) focused on organizational performance, leadership development, and institutional change.

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Alina Wunnava

Executive Project Director – Project Blue Renew

Alina Wunnava is the Executive Project Director for Project Blue Renew, the Department of Revenue’s multi-year initiative to modernize the billing and payment Customer Information System used by the Water Revenue Bureau (WRB) and the Philadelphia Water Department (PWD).

As Executive Project Director, Alina oversees the implementation of Project Blue Renew (PBR), including project management, change management, training, and vendor coordination. She has more than 15 years of experience leading technology projects, business transformation initiatives, and leading cross-functional teams.

Before joining Revenue, Alina spent eight years with the City’s Office of Innovation & Technology (OIT), where she held several leadership roles, including Senior Business Analyst, Senior Project Manager, and Senior IT Manager. During her time at OIT, Alina managed complex technology initiatives focused on improving operations, strengthening system reliability, and enhancing the customer experience. She also played a key role in developing and implementing the MyPhillyWaterBill website.

Alina holds a Master of Business Administration in Business Management from Fordham University and a Bachelor of Business Administration in Finance and Economics from Temple University. She is a certified Project Management Professional (PMP).

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