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Senate

Senate Staff

The Senate staff is comprised of three working groups. The Senate Services staff is nonpartisan and works under the direction of the Secretary of the Senate. The Majority and Minority caucus staff is partisan and works under the direction of their respective caucus leadership.

Senate Nonpartisan Staff
The Senate Services nonpartisan staff provide services to all members of the Senate. Nonpartisan staff are selected without political consideration.
Esther van Mourik
Secretary of the Senate

Phone: (303)-866-4603

Email: esther.vanmourik@coleg.gov

Cindi Markwell
Senior Advisor to the Secretary

Phone: (303) 866-4838

Email: cindi.markwell@coleg.gov

Ryan Breitweiser
Assistant Secretary of the Senate

Phone: (303) 866-5289

Email: ryan.breitweiser@coleg.gov

Jonathan Brown
Calendar Clerk

Phone: (303) 866-4834

Email: jonathan.brown@coleg.gov

Tammy Yancey
Docket Clerk

Phone: (303) 866-4839

Email: tammy.yancey@coleg.gov

Justin Shofler
Reading Clerk

justin.shofler@coleg.gov

Rick Callow
Senate Services Clerk

Phone: 303-866-2316

Email: senate.services@coleg.gov

Sadia Ereg
Chief Assignable Clerk

 

 

Mary Ann Admire
Assignable Clerk

 

 

John Escamilla
Chief Enrolling Clerk

 

 

Mary Klinger
Enrolling Clerk

 

 

Shannon Lochtefeld
Enrolling Clerk

 

 

Frank Lombardi
Chief Sergeant-At-Arms

 

 

Ted Abad
Assistant Chief Sergeant-At-Arms

 

 

Matt Flora
Sergeant-At-Arms

 

 

Lee Vitgenos
Sergeant-At-Arms

 

 

 

Senate Democrat Staff
The Senate Democrat staff provide administrative support, research, policy, and media services to their caucus.
Arriana Belkin
Democrat Chief of Staff

Phone: (303) 866-3827

Email: arriana.belkin@coleg.gov

Michael Crews
Democrat Deputy Chief of Staff

Phone: (303)-866-3005

Email: michael.crews@coleg.gov 

Micaela Parker
Senior Advisor to the President

Phone: 303-866-3931

Email: micaela.parker@coleg.gov

Nina Krizman
Communications Director

Phone: (303) 866-4867

Email: nina.krizman@coleg.gov

Meredith Cooke
Senior Advisor to the Majority Leader

Phone: (303) 866-2195

Email: meredith.cooke@coleg.gov

Jessica Martinez Vasquez
Constituent Engagement Director

Phone: (303) 866-2540

Email: jessica.v.martinez@coleg.gov

Max Nardo
Senior Policy Analyst

Email: max.nardo@coleg.gov

Andrew Fish
Policy Analyst

Email: andrew.fish@coleg.gov

Taylor Stein
Budget and Policy Analyst

Email: taylor.stein@coleg.gov

Melissa Guerrero
Policy Analyst

Email melissa.guerrero@coleg.gov

303-866-3190

Jaclyn Serpico
Policy Analyst

Email: jaclyn.serpico@coleg.gov

303-866-3190

Ellie Lapp
Deputy Communications Director

Email: ellie.lapp@coleg.gov

303-866-3181

Lauren Hill
Press Assistant

Email: lauren.hill@coleg.gov

303-866-3181

Chase Presson
Legislative Coordinator

Email: chase.presson@coleg.gov

Senate Republican Staff
The Senate Republican staff provide administrative support, research, policy, and media services to their caucus.
Jason Helland
Republican Chief of Staff

Phone: (303) 866-2318

Email: jason.helland@coleg.gov

Joshua Bly
Communications Director

Phone: (303) 866-2723

Email: joshua.bly@coleg.gov

Taylor Boyer
Policy Director

Phone: (303) 866-2856

Email: taylor.boyer@coleg.gov

Jerry Wheeler
Executive Assistant to the Minority Leader

Phone: (303) 866-2638

Email: jerry.wheeler@coleg.gov

Hayden Rastall
Deputy Communications Director

Phone: (303) 866-4866

Email: hayden.rastall@coleg.gov

Colin Mullins
Budget Analyst

Phone: (303) 866-2318

Email: colin.mullins@coleg.gov

Natasha Harwood
Policy Analyst

Email natasha.harwood@coleg.gov

303-866-4147

Lawson Faulkner
Policy Analyst

Email: lawson.faulkner@coleg.gov

303-866-2856

Sophia Jantz
Data Analyst

Email: sophia.jantz@coleg.gov

303-866-2856

The effective date for bills enacted without a safety clause is August 6, 2025, if the General Assembly adjourns sine die on May 7, 2025 (unless otherwise specified). Details