Yeng Guiao

Prior to his PBA coaching career, Guiao was the head coach of the Swift franchise in the Philippine Amateur Basketball League with Alvin Patrimonio as one of its top stars. The RFM franchise entered the PBA in 1990, as Pop Cola, joining market rival Pepsi. Guiao was the team's first head coach and led the renamed Diet Sarsi to its first finals appearance, losing to Purefoods Tender Juicy Hotdog in the 1991 All-Filipino Finals.

In the 1992 Third Conference, he led Swift to their first championship with a 4–0 sweep of 7-Up in the championship. It was also Guiao's first championship in the PBA. He would also led the Mighty Meaties squad to two finals appearances in 1993 and 1994, losing to San Miguel and Alaska.

In 1995, Guiao and then-Pepsi mentor Derrick Pumaren were involved in rare coach for coach trade. While Pumaren led the rechristened Sunkist Orange Juicers to two championships that year, Guiao had two forgettable seasons with Pepsi and then-renamed as Mobiline before leaving his coaching position in 1996.

Guiao in 2008.

In 2000, Guiao made his PBA coaching return for the Batang Red Bull Energizers. Despite poor performances in the All-Filipino and Commissioner's Cup, he coached the Thunder to a third-place finish in the 2000 Governors' Cup.

In 2001, he would lead Red Bull to its first PBA title by defeating San Miguel 4–2 in the Commissioner's Cup finals with Antonio Lang as import. The series was marred by physical play between both teams and also Guiao's famous "San Miguel has never beat us with a complete lineup" line, during the series. It was a reference to the PBA suspending Kerby Raymundo and Junthy Valenzuela in Games 3 and 4, respectively as the Beermen won both games.

Guiao would later repeat the same feat in 2002 Commissioner's Cup, leading Red Bull to a seven-game series victory over Talk 'N Text to defend its championship won a year ago.

Red Bull had a two-season title drought, despite several respectable finishes during those seasons. But in the 2005-06 PBA season, he coached the Bulls to the 2005-06 Fiesta Conference Championship, defeating Purefoods in six games and a runner-up finish in the 2006 Philippine Cup, losing to the same Purefoods team, 4–2.

In the 2006-07 Philippine Cup, Guiao led the Bulls to its ninth semifinals appearance in franchise history but lost to San Miguel in seven games. The series saw physical confrontation between teams, even Guiao was ejected in Game 6 for elbowing Dondon Hontiveros and getting involved in a verbal exchange with SMB assistant coach Pido Jarencio.

The Barakos, with a depleted line-up, snatched a slot in semi-finals after it swept powerhouse team Magnolia Beverage Masters 2–0 in best of three quarterfinals of the 2007-2008 Philippine Cup.

In 2008, Guiao resigned as Barako Bull head coach.

In 2009, he was signed by the Burger King Whoppers as the new head coach of the team.

Yeng Guiao and the Elasto Painters during a timeout.

After his contract expired on December 31, 2010, he signed with the Rain or Shine Elasto Painters to become their head coach. As the coach of the Elasto Painters, he helped the team first by making them appear in the Semi-Finals for the first time in Franchise history in the 2010-2011 Governor's Cup.

The 2011-2012 Philippine Cup, the Elasto Painters, with prize rookie Paul Lee and the resurgence of Jeff Chan and Gabe Norwood showed their improvement by making it to the semifinals once again and were one game away from its first PBA Finals appearance before falling to Powerade in seven games. After a forgetful Commissioner's Cup, the Elasto Painters bounced back in the Governors' Cup and topped the elimination round. The team went on to face San Mig Coffee Mixers (then known as the B-Meg Llamados), with Paul Lee out of the series Yeng and the Elasto Painter found ways to beat the Llamados, the Elasto Painters went up 3–1 before the Llamados won 2 straight games to force Game 7. The Elasto Painters won Game 7 and also won their first PBA Title.

Guiao once again led the Rain or Shine Elasto Painters to its 2nd straight (2nd overall) finals appearance once again, but lost to the Talk N Text Tropang Texters in a 4-game sweep.

Guiao again led the Rain or Shine Elasto Painters to the finals for the 3rd time (3rd overall), but lost to the San Mig Super Coffee Mixers in 6 games of the Philippine Cup and then again in the Governors Cup for the 4th time (4th overall) in the final game of the series against the same team.

Guiao would lead Rain or Shine Elasto Painters to the finals of Commissioner's Cup for the 5th time (5th overall), but once again lost in the final game of the series against the Talk N Text Tropang Texters.

Guiao once again lead the Rain or Shine Elasto Painters to the finals for the 6th time (6th overall), this time winning the Commissioners' Cup against the Alaska Aces in 6 games, their 2nd championship in franchise history.

Guiao left the Rain or Shine Elasto Painters to join the NLEX Road Warriors in October 2016.

After a six-year stint with two semi-finals appearances, Guiao left the NLEX Road Warriors to return to the Rain Or Shine Elasto Painters in September 2022.

In September 2022, Guiao returned to the Rain or Shine Elasto Painters for his second stint as the team's head coach.

7× PBA champion, 15× Finals Appearances:

• Swift franchise (2)
  • 1992 Third Conference
  • 1993 Commissioner's
• Red Bull franchise (3)
  • 2001 Commissioner's
  • 2002 Commissioner's
  • 2005–06 Fiesta
• Rain or Shine franchise (2)
  • 2012 Governors'
  • 2016 Commissioner's

On September 25, 2008, he was named the head coach of the Philippines men's national basketball team and tasked with selecting, forming, and training the national squad, with the ultimate goal of competing in the 2010 World Basketball Championship (FIBA World Championship) in Istanbul, Turkey. Guiao was the successor of Chot Reyes, the current head coach of the Talk 'N Text Tropang Texters. Guiao became the sixth coach to head a PBA-backed national squad after Robert Jaworski, Sr. (1990), Norman Black (1994), Tim Cone (1998), Jong Uichico (2002), and Reyes, who had a 9th-place finish in 2007 FIBA-Asia Men's Basketball Championship in Tokushima, Japan.[1][2] After a failed bid, he was then succeeded by Rajko Toroman as the national coach.

Guiao returned as head coach of the Philippines, after Chot Reyes along with several Filipino players was suspended by FIBA for their involvement in the Philippines-Australia basketball brawl of the 2019 FIBA Basketball World Cup Asian qualifiers. Despite the suspension, Guiao managed to secure the Philippines' qualification in the 2019 FIBA World Cup.

The Philippines however did not win one of its five games in the 2019 FIBA World Cup under Guiao. After the campaign Guiao announced his resignation as head coach of the team on September 11, 2019.[3]