Forester Tirso Payot Parian, Jr. is the 20th Regional Executive Director of the Department of Environment and Natural Resources (DENR) in Eastern Visayas. 

Prior to his designation as OIC-RED of Region VIII, he was the Assistant Regional Director for Management Services in DENR Central Luzon.

Director Parian started his career in DENR in 1986 as a Forester, then as Special Investigator of DENR Central Office’s Special Actions and Investigation Division where he was tasked to investigate violations of environmental laws, rules and regulations.

He became an OIC-Community Environment and Natural Resources Officer (CENRO) in Camarines Norte in 1996 and as CENRO in Los Banos, Laguna in 2002.

Director Parian also served as the Regional Technical Director for Protected Areas, Wildlife and Coastal Zone Management Services (PAWCZMS) in DENR Region VI from 2009 to 2010. The following year, he was assigned in Central Luzon as Regional Technical Director for Land Management Services (LMS), where he significantly contributed to the region’s completion of its cadastral survey and facilitated the issuance of land titles under the Handog Titulo program. 

With the reorganization of the Department following the implementation of its Rationalization Plan, he was given the Assistant Regional Director for Management Services post in the same region in 2015 which paved the way for his Chairmanship of the Human Resource Merit, Promotion and Selection Board (HRMPSB) and the Regional Bids and Awards Committee (RBAC), among others.

As HRMPSB Chairman, he helped facilitate the filling up of vacant positions region-wide under the Rationalization Plan and was instrumental in elevating DENR Region III to PRIME-HRM Maturity Level 2, qualifying the region for bronze award.

As RBAC Chairman, he instituted some reforms in the processes for the procurement of goods and services and strictly implemented the provisions of R.A. 9184 otherwise known as the "Government Procurement Reform Act."

Director Parian was installed into office as OIC-Regional Executive Director for Region VIII on December 13, 2019 by Undersecretary Ernesto D. Adobo, Jr. in compliance to DENR Special Order No. 2019-970 issued by DENR Secretary Roy A. Cimatu.

He obtained his degree in Forestry at the University of the Philippines, Los Banos, Laguna.

He is a Career Executive Service Officer Rank IV (CESO IV).